It looks like the trigger was pulled too fast on this. Running the latest snapd, and the steam-support socket is missing.
alan@deep-thought:~$ snap version
snap 2.55.3+git573.g7800537
snapd 2.55.3+git573.g7800537
series 16
ubuntu 22.04
kernel 5.15.0-27-generic
alan@deep-thought:~$ sudo snap install steam --edge
2022-04-29T17:53:42+01:00 INFO snap "steam" has bad plugs or slots: steam-support (unknown interface "steam-support")
2022-04-29T17:53:43+01:00 INFO snap "steam" has bad plugs or slots: steam-support (unknown interface "steam-support")
steam (edge) 1.0.0.74 from Canonical✓ installed
WARNING: There is 1 new warning. See 'snap warnings'.
Seems the steam-support plug hasn’t landed yet? So this can’t work yet?
It does launch and run though. 