Following below verifies Fedora 33 beta L1 Guest ability to perform KVM deployment Fedora 33 beta L2 Guest inside itself. Deployment is based on bridge to virtual interface of L1 F33 beta guest due to L1 guest has been deployed on external office network , L2 Guest also appears to be set up on the same external network.

Source: LXer – Setting up Fedora 33 beta L1&&L2 KVM guests all seating on the same office LAN