LAX-SYD a few weeks ago they proactively offered PJs. The order seemed a little random so I suspect they were doing it in some from of status order (there were a number of pass riders/standby passengers in Polaris, so I think they wanted to make sure the paying passengers got them first).

SYD-SFO a few days ago no proactive offering. Asked for some after dinner, only to be told they had run out of the S/M size and only had the L/XL available. Towards the end of the flight I saw a huge "Amenity Kits" bag full of them sitting on one of the unused business seats, including S/M.

It really is amazing how much variability there is between Polaris cabin crews... (This was only one of the difference between the two flights - almost all of it coming down to an excellent v's mediocre crew).