The reason why I'm expressing suspicion (and I obviously don't want it to be true) is that there'd be almost no doubt at this point from all rumour sites/influencers that it would be 32GB if it's black and white on a schematic. The fact we still have various platforms saying there're rumours it's up to 64GB is a good sign. We have no true way of knowing this really going to be the case, i.e. if the schematic is legit, and what sort of developments may have changed since then if it has. I also feel like Apple would be hurting themselves by offering less RAM than what they're replacing. Wouldn't be a good way to retain customers.
we'll know on monday... AFAIK, the biggest available RAM chips right now are 16GB. looking at the layout of the 14" MBP's MLB, we can't tell how many RAM chips are going to be used because they're soldered onto the M1X SoC. the new SoC looks like it's about twice as big as the M1. so maybe Apple will use up to four RAM chips, IDK.