By default room calendars delete the notes field of invitations. This eliminates usufull links to Zoom or Teams meetings. to fix this run the following script:
$Rooms = Get-MailBox | where {$_.ResourceType -eq “Room”}
foreach ($Room in $Rooms){
Set-CalendarProcessing -Identity $Room.alias -AddOrganizerToSubject $true -DeleteComments $false -DeleteSubject $false
Get-CalendarProcessing -Identity $Room.alias |select Identity,AddOrganizerToSubject,DeleteComments,DeleteSubject,ResourceDelegates}