She learned a floor routine because she expected to be ready sooner. She planned to go to camp, then she planned to go to Winter Cup, then she planned to go to American Classic. The ankle injury made it difficult to land tumbles on a hard floor, and she ran out of time.
She still got to show the routine in podium training, and like you said can use it to try to make Worlds at selection camp. She can also use it all of 2022. She didn’t come back just for the Olympics, and said she’ll continue going as long as it stays fun.