I got around to testing this and no, edge palmdet still sucks on Apple trackpads. Even with the fixed trackpad dimensions, at least on 16" models, it causes noticeable deadzone behavior on the left/right/top and stuff like touches being completely ignored if they come in from those edges and move towards the center slowly enough. That's not acceptable.
Teoh Han Hui (npub1ysq…xd3s) can you test libinput with this reverted?
https://gitlab.freedesktop.org/libinput/libinput/-/commit/4a8b5e6ec445b507fc0b1ef9842a60bf13c58772
If it fixes your issues then we need to file a bug on libinput to make edge palmdet less aggressive so it can be enabled again. If it doesn't then libinput needs some other algorithm or tweak to help palmdet for the tap-to-click case on Apple.
