Can confirm, Perth lounge is at pre-covid levels minus the self serve. I'm currently there twice a week and it's never been crowded, even with the QC closed (there is a sign directing people to use the business lounge, I assume this includes QC members). You can walk up to the buffet, wait behind a line and a staff member will hand you your selection on a prepared plate. You can also order from the staff while seated, which is a great improvement. Pizza is still being made!
In regards to Broome, you need to ask for access once you've passed security and they'll buzz you through the door. Very limited selection, no real food other than crackers, cookies and cheese. The usual regional lounge fridge with beer, wine, juice and soft drinks. Again, wait behind a line and the lounge attendant will hand you what you desire. I've been the only guest a few times, talk about attentive service! Only place with aircon in the airport.