Welcome to the forum @mlncn_4!
1. It will be a very similar process. The parking sensor part numbers should be different than 2019-2024.
2. Your only options are: A. 4 rear sensors, B. 4 rear + 4 front sensors, or C. 4 rear, 4 front, and 4 autopark sensors. If parking sensors are missing or have problems, then the entire park aid will get disabled.
3. I haven't installed the front camera yet. It will be installed later. I had to return the camera I got and ordered a new one.
4. The interior of the bumper has rectangular marks with a circle inside them (Thanks Ford). That is where the factory parking sensor retainers get plastic welded to. I was able to glue on all 8 with one tube of J-B Weld plastic glue. It doesn't look like Ford produces parking sensor retainers as a part. Salvaged ones online were too expensive, so I went with aftermarket ones that worked well. Make sure that the parking sensors will point in the correct direction.
If you look closely, you can see the markings in the lower front bumper cover.