I am shopping for a 22 F250/350 King Ranch or Platinum right now to pull a future tt, so going thru same issues. One can't believe the Ford published payload numbers UNLESS you are shopping a completely stripped truck. Any options or trim packages add weight to the truck that reduces the Ford published payload numbers on your optioned truck.
Also never saw any trailer loaded hitch weight numbers (or ranges), so no way to know for sure what trailer you are looking at might be placing on the truck. All depends on how much you take with you and where you place it in you trailer.
Ford only makes a King R or Plat in crew cab 6.75' bed. The door jamb sticker I saw yesterday on f250 7.3 KR 3:55 rear crew cab 10k gvwr 6.75 bed had 2,620 payload (pretty sure the spec was 3,470 lbs). Makes the base truck 7,380 lbs by itself.
Have not seen any method to obtain real world Ford truck weights except look at a lot of door jamb stickers. For me, that is difficult as not many loaded trucks near me. Dealers have a system that approximates numbers by trim packages, but 2 I checked the stickers on were both less than Ford numbers. Depends on final options on your truck.
Also saw a 2020 F250 Lariat Tremor cc 6.75 7.3 4:30 10k with payload sticker of 2815 lbs. The 23/24 models are different than the 2020s I am looking at, but these should give you some indication of real world sticker numbers on your search. If you are looking at an optioned truck I would deduct at least 700-800 lbs from published payload.
