Waaaaaaaaay too early.
Meanwhile, the OWG team event rules for 2014 and 2018 would not have allowed these choices for Team USA.
For each country, no more than two disciplines were allowed to have different entries in team SP/SD vs. team FS/FD.
(Never say never, but I am not expecting the rules to change for 2022 OWG.)
You are right on the 2018 entries rules. Maybe Alysa can do both SP and FS if the rules would be the same. The result may be the same.