Microsoft Teams Sub-Channel Permissions

[IamJustAmir]

Hello, I am new here. Can anyone show me a step-by-step guide on how to restrict users inside this private sub-channel to delete files that they have uploaded? I apologize if this is quirky or quite simple for other Phyton community members but this will help me a lot in my future

First attachment will be the main user interface (No changes) - Refer:    

Secondly, when the user right clicks the file (Kindly assist me to remove the 'Delete' function) - Refer:    

Thank you.

Sincerely,
AA