Features missing

Hello I can run both the arm7 and the aarch64 retroarch from the buildbot but I noticed some cores miss in each versions… And some of the same cores may have missing options or features in one of the versions… Is that normal? Can anything be done about it?

Should I use the arm7 or aarch64 Retroarch? Maybe if you could unite the 2 apps to download all the cores that would be awesome and save me time every time I need to uninstall one of the versions to use the other one so I can use a few of the cores which miss