There never was a 3600G or 3800G. So I'm imagine the next APU will also stop at a 4400G, which given its priced/placed so low in their stack, may not actually be better as a CPU than some Zen+ parts still hanging around like the 2600x or 1600AF, and almost certainly won't be as good as higher tier Zen2 parts like the 3700x or 4900H.

I also think there would be a market for a 4900H in a desktop form factor but I don't think AMD will make one.