Looks like you should be good with your current motherboard,
https://www.msi.com/Motherboard/support/B450M-PRO-M2-MAX#support-cpu
Copied from above page
RYZEN 5 | Renoir | 100-000000150 | 4600GE | 100 | 3.3GHz | 3MB | 8MB | N/A | 35 | AMDRadeonGraphics 1900MHz | 7B84vAC.zip |
May need a BIOS update before swapping it out..
Also you will need to see if your current RAM Memory is compatible with the new processor by looking at the Motherboard's QVL list for RAM Memory for the Renoir processor.