https://www.waynedupree.com/2021/03/white-house-biden-genell03/
That is AOR1 desert /arid digital camo pattern used by SEALS seen through a night vision device (green phosphor). IR light reflects differently through NODs so patterns are not always what they seem.
The flag as you known is the Navy Jack from 1775 designed by US Commodore Hopkins.
Connect the dots.