This can be closed now.
Looks like the issue has been fixed as of
https://git.savannah.gnu.org/cgit/guix.git/commit/?id=edfb05e16d409ab71f5cc5c91747b693f0054d59.
Thank you!
- bug#69828: greetd-wlgreet-sway-session unable to login (Respa... Franz Geffke
- bug#69828: greetd-wlgreet-sway-session unable to login (... Franz Geffke
- bug#69828: greetd-wlgreet-sway-session unable to login (... Franz Geffke