Switch to libsoup3
The GNOME project is switching its core set from libsoup2 to libsoup3 for the GNOME 43 release.
GNOME Video Arcade should switch too (although I don't think it's required to be complete for the GNOME 43 release since libsoup2 will still be in distros for a while longer).
https://libsoup.org/libsoup-3.0/migrating-from-libsoup-2.html