What would you call this tactic? What name would you give it?

Danger levels?

Destructive combination.

A counterthreat, maybe? You obviously can't take the queen as Black (Bxf3? Nxc7+!), and taking the knight is also a bad idea (according to the engine, it's a long and difficult sequence after fxe6, but White is ultimately still winning due to superior piece activity and king safety. Bxe6 immediately loses a rook and allows for a bit of simplification, so that's also not a thing).

The only issue is that Black has to take the knight; because if they don't, they lose material and/or castling rights. So, maybe Zugzwang can be applied to it as well, even though Zugzwang in the middlegame is generally considered to be impossible.

Edit: That's probably not how Zugzwang works, actually. Black would definitely rather not pass their turn here, so I guess I got that a bit wrong.