If I had to guess, I think it might be the Covid timeline reason. Most of those players in that 2023 wouldn't have visited before Covid, unless they camped at Iowa. I'm guessing most will try and make some gameday visits and then potentially commit in the spring after in-home visits.
I would put the number at 3 for 2023. The most mutual interest at this point seems to be Audi Crooks, Sahara Williams, and Kennise Johnson-Etienne. A guard, forward, and post makes sense to me. Jasmine Brown, Macy Brown, and Lenee Beaumont have some interest as well. I think Iowa is also recruiting Taylor Woodson in that class, but finding any information on her recruiting is nearly impossible.
As far as players returning, this is purely speculation, but I could see any of the current juniors returning for an extra year. Especially Kate Martin, given her connection to the program and how highly they view her leadership.