How can I remove sun glare from hair in a photo?
I would probably just use the clone stamping or healing brush, depends on the extent of the gLare. There are tons of tutorials on how to fix glares, you can search and find one closest to the way your glare is.
Here’s an example:
https://shwinandshwin.com/2011/04/photoshop-tutorial-fixing-sun-glare.html