Have seen multiple reports of this across Facebook the last few days since the last release. There is also a post on the “known issues” forum too: Zwift not connecting via Bluetooth to TRUE Performance 800, Landice L7 Treadmills [January 2023] - #11
Rumour has it there is a patch to correct this coming out but I haven’t seen anything official. If you’ve got a pod or alternative method of connecting that may be your best bet…Sorry not to have better news!