Have you been assigned a system administrator role in D365?
If yes, you can go to Data management where you can see the table names available within different modules.
1. Navigate to Data management workspace > Click on Data entities tile or
2. Navigate to System administration module > Data management > Data Entities tile
You can see all the tables within the data entities form that are available in different modules. To save time you can select the entities, export them in Excel using the excel add-in data connector available on the same form.

See screenshot as below:

Hope this helps.
Thanks,
Shilpi
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