There is no Smith & Wesson revolver with a "squeeze trigger guard"
First I was speaking in general terms, not limiting anything
Then (to coin a phrase) depending on what "is" is- whether you mean as in current manufacture or past manufacture.
I'm not aware of a current Smith that has this ( but I don't memorize every model of everything made either) but I assure you turn of last century break top (S&W ) and other manufacturers models certainly do have them.
They are not pinned and have to have the ends compressed to lock in the receiver as a trigger group assembly- I made a tool for the vice to do them.