My problems were milder than yours but I noticed the same thing. All my joints feel much better. Tirzepatide helped first and then reta did too, with clear pain relief even before I lost much weight.
My spine is in bad shape. I'm partially disabled at 30 and nearly needed another surgery with rods and screws. After two months on reta and dropping 25 pounds the pain dropped a lot. This drug may have given me my life back.