I did an export/archive of the Git repo from a commit before they got rid of Batoto and Mangadex right after they nuked them (ie, no Git data, just the bare source code) yesterday morning. I’d be willing to share it with someone willing to rehost/restart development on them.
OneDrive sync up from my phone (since Samsung uses them as backup), which is then mirrored down to my 2-Bay Synology NAS. The entire NAS is backed up to iDrive (no it’s not Apple, believe it or not)