No. The certification means it’s passed their specific “point” by point inspection. We’ve had FRF by “certified” trucks that were tuned - IOW, the warranty on at least the powertrain was compromised. That’s fine if it’s your choice, but, if you buy it and have a major engine issue, Ford will send staff out and the Tech is going to find it tuned. Tuned is almost always a powertrain warranty denial. Ditto suspension mods. We’ve seen lifted trucks sold as certified. That’s great if you want that, but any of the affected suspension & driveline components are probably not going to be covered if they break, or wear out. Or maybe the PO traded it because it has some annoying, intermittent NVH issue which are very difficult to troubleshoot.
You have to check the truck out every bit as thoroughly as any other used vehicle. The Rap is easy to check out, you can crawl under and inspect without a lift. Get dirty checking it out. Take a good test drive, and look for the generation specific issues on any purchase.