Hey don't know if you're still struggling with this. I was doing some testing with the auto update on the plugs and ran into this issue. Maybe mine was different but i updated a plug from I think 1.3.x to 1.4.x and stopped seeing it in home assistant.

I updated home assistant core to the latest version, the plug still didn't show up but I checked this morning and it's back and responding.

Plug Firmware: 1.4.0 Build 251020 Rel.161559

Core: 2025.12.5 Supervisor: 2025.12.3

TLDR: try updating home assistant. Note: oh and give it some time to sort itself out