It's hard to review large pull requests with a lot of files. So it would be nice to mark as approved some files that you are sure that are ok. It would be nicer if these files that you already reviewed, be collapsed so you didn't have to look at them anymore, unless they have changed again.

A mark on the side of the files that I approve on the list of changed files would be nice too.

Latest update from Atlassian 2023-10-06

Bitbucket Cloud has shipped a feature allowing pull request files to be marked as viewed (and therefore visually collapsed): 

https://community.atlassian.com/t5/Bitbucket-articles/Keep-track-of-viewed-files-on-Bitbucket-Cloud-pull-requests/ba-p/2497882