Explanation
Picklist values, help text, and decimal places are three aspects of standard fields that an administrator can customize to suit their business needs. Picklist values are the options that users can choose from a picklist field; they can be added, edited, or deleted by administrators. Help text is the text that appears when users hover over a field; it can be customized by administrators to provide additional information or guidance for users. Decimal places are the number of digits that appear after the decimal point in a number or currency field; they can be changed by administrators to adjust the precision of the field values. Field history tracking and field name are not aspects of standard fields that can be customized; they are only available for custom fields. References: https://help.salesforce.com/s/articleView?id=sf.customize_picklists.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.customize_fields_edit.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.customize_fields_number.htm&type=5

Explanation
Formula fields are types of fieldsthat calculate a value based on an expression or formula that references other fields or constants. Formula fields prevent administrators from changing their field type once they are created because they may be referenced by other functionalities such as reports, validation rules, workflow rules, etc., that depend on their data type and value. If a formula field is referenced by other functionalities, then changing its field type may cause errors or unexpected results.
References:https://help.salesforce.com/s/articleView?id=sf.fields_about_formulas.htm&type=5