Well Ronald Acuna of the Atlanta Braves had an acl tear July 2021.
He missed the start of 2022 season. When he came back midway through the 2022 season, he suffered from pain an swelling in the knee.
He missed lots of games and was hesitant to play.
The Braves training staff told him it was normal to feel pain and swelling as a normal part of the rehab process. He had MRIs but there was no further damage.
I suspect that White is ok but it is entirely possible that White is feeling pain as he is training now and it is unsettling to him.
Sometimes if you feel pain you may feel that you're not ready to go