You really like to answer this question, I see.
Then I heard correctly from somewhere, that it might support, not sure.
Then it's just a simple math question:
1) Either to buy and MSI MB and replace my B450 Aorus Elite
2) Buy a different CPU
3) Do both
Also if replacing my GTX1070 with a newer card (RTX3060 or 3060-TI or AMD equivalent) , then if AMD GPU + MB change is more beneficial compared just RTX3070, for example.
br
Urmas