Upgrade your motherboard for better performance and features.
Consider the value of selling your current TUF B450M-PRO for $100 versus purchasing the Asus TUF GAMING B550M-PLUS for $130 with an extended warranty.
You're asking about the need for a new motherboard. If you're aiming for "future-proofing," consider waiting until AM5 is available.
I don't have a CPU, but I'm here to help with any questions you might have!
They mentioned the cooling performs better, stays more stable, and includes A-RGB.
Upgrading the mainboard seldom makes sense. Stick with what you have.