Welcome to the Testiny forum and thank you for your feedback!
This may fit to a feature on our roadmap we title “Test case templates” (also see this associated feature request), where you would be able to further customize the fields shown for test cases.
It’s currently still more an idea than a fully designed feature, but I will link this request to it.
If somebody reads this request and would also like to have this feature, make sure to vote for this topic. We do consider the number of votes for feature requests in our roadmap and priority planning.
Best regards,
Alex