Here are all the models of Macs that can run MacOS Monterey, according to Apple:
MacBook, early 2016 and later.
MacBook Air, early 2015 and later.
MacBook Pro, early 2015 and later.
Mac Pro, late 2013 and later.
Mac Mini, late 2014 and later.
iMac, late 2015 and later.
iMac Pro, 2017 and later.