Update to my project. So instead of getting new Key Fobs, I followed the advice from
@snakedoctor00 and
@H3LZSN1P3R and soldered switches onto my tradesman key fob in the locations of the tailgate release and remote start buttons. I enabled remote start in alphaOBD. I now have working tailgate release and the truck horn sounds when remote start button is hit. Just have to wire the hood ajar switch and all should be in working order. Even got some silicone covers for Fobs with correct button labels from Amazon. Including the hood latch and tailgate damper it was less $100 to get both added and no trips to dealer.