Hello @Perisa, Nik
https://learn.microsoft.com/en-us/entra/fundamentals/whatis
As you mentioned entra settings policies. So, within Entra ID there are multiple features linked. Details or overview about each product or feature is explained in the above document. Please let us know if you need more information on specific areas such as app registrations, enterprise applications, devices, users, groups, or conditional access policies.
Do Let Us know if you have any Queries. We are happy to assist you further.