Could be usefull IApplicationDbContext interface or reorganize?

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I'd like to expose the following question:
Could it be useful to have an IAPPLICATIONDBCONTEXT interface in the Application project (I believe) project? I understand that it would introduce a dependency with Microsoft.entityFrameWorkcore and that a repository (Ardalis) approach has decided to access data.

And I was wondering with this approach some logics even a little more complex validation (Request Validator) would become a bit too verbose / repetitive and full of repositories ... in case it would be appropriate to introduce a reusable services section: (examples)

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