She had a bad qualifications round and warmups - even her teammates said they were scared watching her warmup so whatever the issue was yesterday wasn’t the first day it was prob a day or two before that.
Not saying they would have won the gold but the alternate would have had more time to warm up - the person that replaced her on bars literally had 30 seconds to warmup
I agree with what you are saying, but the alternate wasn't in Japan that night. See link below. She had been in Japan, but had to leave the country. Crazy covid rule. If they had dropped Biles a few days earlier, yes. But subbing in the alternate that night after warm-ups wasn't an option.