I'm intrigued by this. I'm typing this one-handed on the MacBook with my other hand resting on the trackpad without interference of any kind. The hinged trackpad on the P14s takes between 5-10 minutes to be useable from a cold start (these happen often due to the combination of an anaemic battery and power-hungry Intel processor); it's as though it needs to warm up. It is a pile of overpriced junk not worth the value of the parts it's made with. I've had other ThinkPads and generally disliked them - even the X series, but that boiled down to personal taste - not a fan of the aesthetic - and a crap trackpad. This P14s, though, is unmitigated shite.

My experience of the P14s says that either I have a dud (other colleagues complain vociferously about them, too) or your MacBook is defective.

I have zero love for the trackpad+keyboard.

But 80% of my usage with external keyboard and mouse.