According to ISO/IEC 27001:2022, information security risk can be accepted as one of the four possible options for risk treatment, along with avoiding, modifying, or sharing the risk12. Risk acceptance means that the organization decides to tolerate the level of risk without taking any further action to reduce it3. Risk acceptance can be done before, during, or after the risk treatment process, depending on the organization's risk criteria and the residual risk level4.
References: 1: ISO 27001 Risk Assessments | IT Governance UK 2: ISO 27001 Risk Assessment: 7 Step Guide - IT Governance UK Blog 3: ISO 27001 Clause 6.1.2 Information security risk assessment process 4:
ISO 27001 Risk Assessment & Risk Treatment: The Complete Guide - Advisera

Explanation
According to the ISO/IEC 27001:2022 standard, an internal audit is an audit conducted by the organization itself to evaluate the conformity and effectiveness of its information security management system (ISMS). The standard requires that the internal audit should be performed by auditors who are objective and impartial, meaning that they should not have any personal or professional interest or bias that could influence their judgment or compromise their integrity. The standard also allows the organization to outsource the internal audit function to a third party, as long as the criteria of objectivity and impartiality are met.
Outsourcing the internal audit function to a third party can be a better option for small organizations that may not have enough resources, skills, or experience to perform an internal audit by themselves. By hiring an external auditor, the organization can benefit from the following advantages:
The external auditor can provide a fresh and independent perspective on the organization's ISMS, identifying strengths, weaknesses, opportunities, and threats that may not be apparent to the internal staff.
The external auditor can bring in specialized knowledge, expertise, and best practices from other organizations and industries, helping the organization to improve its ISMS and achieve its objectives.
The external auditor can reduce the risk of conflict of interest, bias, or influence that may arise when the internal staff audit their own work or the work of their colleagues.
The external auditor can save the organization time and money by conducting the internal audit more efficiently and effectively, avoiding duplication of work or unnecessary delays.
Therefore, outsourcing the internal audit function to a third party is acceptable and often preferable for small organizations that are implementing an ISMS based on ISO/IEC 27001.
References:
ISO/IEC 27001:2022, Information technology - Security techniques - Information security management systems - Requirements, Clause 9.2, Internal audit ISO/IEC 27007:2023, Information technology - Security techniques - Guidelines for information security management systems auditing PECB, ISO/IEC 27001 Lead Implementer Course, Module 12, Internal audit A Complete Guide to an ISO 27001 Internal Audit - Sprinto

According to ISO/IEC 27001:2013, clause 9.3, the top management of an organization must review the ISMS at planned intervals to ensure its continuing suitability, adequacy and effectiveness. The management review must consider the status of actions from previous management reviews, changes in external and internal issues, the performance and effectiveness of the ISMS, feedback from interested parties, results of risk assessment and treatment, and opportunities for continual improvement. The management review must also result in decisions and actions related to the ISMS policy and objectives, resources, risks and opportunities, and improvement. The management review is a critical process that demonstrates the commitment and involvement of the top management in the ISMS and its alignment with the strategic direction of the organization. The management review also provides input for the internal audit and the certification audit.
SunDee has neglected to conduct management reviews regularly, which means that it has not fulfilled the requirement of clause 9.3. This is a major nonconformity that could jeopardize the renewal of the ISMS certificate. The certification body will verify whether SunDee has conducted management reviews and whether they have been effective and documented. If SunDee cannot provide evidence of management reviews, it will have to take corrective actions and undergo a follow-up audit before the certificate can be renewed. Alternatively, the certification body may decide to suspend or withdraw the certificate if SunDee fails to address the nonconformity within a specified time frame.
References:
* ISO/IEC 27001:2013, Information technology - Security techniques - Information security management systems - Requirements, clause 9.3
* PECB, ISO/IEC 27001 Lead Implementer Course, Module 9: Performance evaluation, measurement, and monitoring of an ISMS based on ISO/IEC 27001
* PECB, ISO/IEC 27001 Lead Implementer Exam Preparation Guide, Section 9: Performance evaluation, measurement, and monitoring of an ISMS based on ISO/IEC 27001