Looks like it just concatenates them:
The shared secret is calculated as the concatenation of the X25519 shared secret (32 bytes) and the Kyber768Draft00 shared secret (32 bytes). The resulting shared secret value is 64 bytes in length.
https://www.ietf.org/archive/id/draft-tls-westerbaan-xyber768d00-02.html>
And that’s a bad thing?
The desktop is finally catching up with the more restrictive permissions model where an app doesn’t just have the ability to do anything the user can do but instead only has access to what it needs.
Going with a familiar interface style like the ones people already use on mobile just makes sense.
What would you want it to look like instead?