I’ve got a pair of MK2 2.4 Protections. As above, avoid the RaceSport unless it’s purely for racing, as they are made of paper.
They’ll be pourous if you don’t scrub the inside with IPA or fairy, as there will be the mould release agent still present, which stops the sealant sticking to the rubber.
So pop some cleaner in the tyre, scrub it a little with a stiff brush, and then wash clean and dry.
After that, its the same tubeless routine. I have them seal at under 20psi on my Crest and Arch EX rims. They’re easy peasy to get to seal, as are all Contis if you follow the above.
2.2s come up as 2.0 in my book (with my digital calipers), and 2.4s come up at 2.3. This is on Crests and Arch Ex, which have quite a wide profile.