Most have been for some time now. As the announcement post says:

> the Wasm Community and Working Groups had reached consensus and finished the specification in early 2022. All major implementations have been shipping 2.0 for even longer.

> In a future post we will take a look at Wasm 3.0, which is already around the corner at this point!

Features in 3.0 presumably also being mostly implemented already, some maybe just kept behind feature flags.