Hair loss for a 5 year old.

Rosemary • Age 34, Mother of 2 beautiful Girls 3/2/17 & 9/29/20

This is my Daughter's hair. And I wanted to know what is the normal amount of hair loss? This is 4 days with out a shower. I had to clean out my drain hair catcher 3 times, and the brush 2 times. She did have covid the beginning on June. If anyone has any advice or experience with this type of hair and hair loss. Please let me know if I should talk to a doctor or if it is just normal. She does have a Doctors appointment in October and will bring it up then.. but it kind of worried me for one because I had extreme hair loss as a teen and now have really thin hair. My hair used to look as thick as hers as a kid.