DetachedCertificate supported in Putty but not in Kitty

[Finnlife]

In Putty there is a Reg Key called DetachedCertificate.
You can specify a pub Key File.

Its being used to accept a CA as CA for the HOST-Key i think.
Would be great if it would be possible to add this to kitty since currently its not possible for me to use kitty as a client for
proxied SSH Sessions via Teleport.
They use a custom CA for their Host-Keys.

Maybe there is a way, but I didn't find it.
Would also be great if there is a Commandline-Option to define this.

Thank you

[Finnlife]

I think this is related