Hello I have a questions which may be answered in the Doc's but I cannot seem to find it.. Does anyone know how to rebuild the Kolide Fleet Servers while keeping the same enrollment key for endpoints?

Depends on what you mean by "rebuild", but I think you can just copy your old enroll secret and set it in the new instance on the settings page.

The first u need to backup your key jwk. Key enroll will be gen base on jwk.

^ This is incorrect. Are you referring to jwt key? Those are not used for the host enroll secret.

No I have tested with 2 fleet servers. I just use one jwk for 2 server . fleet will generating to same key enroll