A motherboard doesn't add any performance though so no point in overspending on one.
I have B450 tomahawk, 5800X and an RTX 3080 and I get just the same gaming experience as someone who brought a £400+ dark hero or aorus master with a 5800X and 3080.
Same CPU and GPU as you, but with X570 Tomahawk. I'm happy with my budget mobo and couldn't be tempted to go for an expensive one.