I'm feeling dumb, I didn't realise that the phones actually had the MagSafe magnets inside them, I thought it required a case. I just got my new Moment case (3 day delivery from the US - impressive) and when I went to fit it I could see the outline of the magnets in dust on the back of the phone.
Anyway I have the new case on and it works better on my wireless charger, currently drawing 1A at 5V so not fast but quick enough, it isn't getting very hot either, something it did in the last case I had when I could kind of make it work. Clearly it was too far from the coil.
The stand I have here is
this Spigen one, it's great as with my X there was no issue of placement, as long as it was on the stand it charged. It would've been nice if they had placed the charging coil lower on the 12 Pro Max as it's just too high up, I have to sit it horizontally on the stand (it has two coils). I'll probably modify the 'foot' of the charging base to let it sit lower, I'm probably going to do the same to the
charger I have for the Tesla to allow the coils to line up.