Well this sucks. I use Flatpak all the time, so I guess this means I'm going to be even more dependent on systemd than I was before.
I don't hate systemd as much as most of its detractors; in fact I like how easy it makes it to manage services, but with the age ~~verification~~ attestation controversy, and the performance improvements I witnessed switching my Pi-Hole box from Debian to Alpine, these things have caused me to question my use of systemd.