Photos App

The Photos App displays Photo and Video files by thumbnail image, organised by date and by assigned album. Individual filenames are not exposed by the Photos App.

If you wish to see and/or organise photos and videos by filename, you’ll need to use a third-party File Manager App. Of the many available in the Apple App Store, perhaps consider Stratopherix FileBrowser - Document Manager, or its “pro version” FileBrowser Professional:

https://apps.apple.com/app/filebrowser-professional/id854618029

https://apps.apple.com/app/filebrowser-document-manager/id364738545

You might review the extensive online Manual and help files to determine suitability for your needs.

https://www.stratospherix.com/products/filebrowserprofessional/filebrowser-professional-user-guide.php

Different App Developers may be working to different design criteria - and in this case, Apple’s Photos App doesn’t meet your specific needs or expectation. This shouldn’t of itself suggest that the App is deficient, but does perhaps suggest that there will be something more appropriate for your need. In this respect, I have attempted to direct you to something more suitable that does meet your described requirement.

Apple invites submission of constructive critique and feature requests via its Product Feedback portal. For iPad and iPadOS:

Feedback - iPad - Apple

If you would like to see different or enhanced functionality as relates to the Photos App, or anything else, this would be the most appropriate channel through which to make the request or offer comment.

The Apple Support Community is a user-to-user support forum. Contributors here are all end-users, just like you. Other than the site Moderators, Apple neither monitor not participate within the Community. As such, any unsolicited feedback that you wish Apple to see or act upon will not be seen if posted here.

This is a user helping users with tech questions, we are not apple and apple do not read your posts here

If you wish to reach out to apple then try  Get Support (apple.com),  Contact - Official Apple Support

Or provide them with feedback Product Feedback - Apple