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

Danger levels?

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.

the andyclifton?

going through a quick analysis (mine, not an engine, so basic skill), it seems white is in a better position no matter the response from black. and, some sequences are forced moves for black, so white is in control.

getting back to the name, i don't think there needs to be a name for this. it's just a good move.

It needs not being a single category.

By the way, is 14.Nxe6 better than the pseudo-Queen sac 15.Qxd5? Both look devastating to me.

They are both fairly strong, but in the Queen Sac line some of Black's replies weren't forced.

fxg5, for example.

The Nxe6 line looks FORCED.