I haven't watched any of it but I read that at least 1 of the women gymnasts knelt.
When would they have knelt? No medals yet, so not anthems.
the 1st article I read was in error. It was a woman from Costa Rica supporting BLM. There is a rule against that kind of protests so she worked into her floor routine. At the end of her routine, she finished by taking a kinee and doing a BLM fist salute.