I cannot do it, I do know nothing about compiling an Android (it is a platform that repels me away admin-wise), and it is also beyond my git knowledge to do merge requests.
Is it an issue that should be adressed to the ScummVM developers directly?
No one is responsible for it. If no one update it, then it won’t be updated. I did try to update it last year but I found it’s to complicate. We have many packages to maintain and so we can’t spend too much time on it. It would be better if you can find someone who is familiar with building this package and would like to spend time on it.
As I understand the matter, and I am ready to be corrected if I am wrong, the onus is entirely on the author or developer of each application to provide F-droid with updated versions. F-droid has no obligation to prompt him. If the author fails to provide updates, users should contact him not F-droid.
No one has onus to maintain the package. Most packages are updated automatically. But if a package is not updated for some reasons, then someone needs to update it manually. If no one is willing to update it then it’s not updated. As am F-Droid contributor I’d like to keep more packages up-to-date but ScummVM is so difficult to build that I don’t have enough time to update it.
As long as it still works we generally keep it in main repo.
So, then can you at least add a bold text at the beginning like “This is a very outdated version of this app. Up to date versions are available not via f-droid” or so, to inform/ warn users?