Your touchpad is not mechanical! Unlike the older trackpad, it also is very large!
Apple doesn’t state it but through experimentation its clear the outer edges and corners can evoke palm rejection if the surface is dirty!
Using a micro cloth very slightly dampened with 85% Isopropyl alcohol and wiping the surface of the uppercase and the touchpad to remove any skin oils.
Even still you may find the sensitivity is still a bit high. So far Apple has not offered a solution. All I can say is get accustomed to using the inner third of the touchpad for the click action