MSI x570 tomahawk paired with duel Evo 970
MSI x570 tomahawk paired with duel Evo 970
Checking the upgrade options, the MOBO tier list suggests the MSI Tomahawk works well for this setup. There are two M.2 ports available, so adding two 970 EVO drives should be feasible. If not, consider another board that supports dual M.2 slots and meets your needs.
All common m.2 NVMe SSD dimensions are compatible. That means it should work without issues.