I have a Z13 with virtualized button on the Touchpad. At least the simulated haptics are decent. But I agree that 3 physical buttons should be standard. I however also have external ThinkPad/Trackpoint keyboards which I use most of the time. I am waiting for a track point keyboard for the framework. However the framework market place, that was supposed to serve niche needs, is rather an illusion.
I do hope other manufacturers will fill this gap. Lenovo's quality has been going downhill.
Typing this on a Lenovo Thinkpad P16 gen2