I am currently the sole admin. If a trusted community member wants to join me, they of course can but there really is not much to do besides approving new registrations and upgrading lemmy from time to time. In the case of me getting hit by a bus, decentralization is still given since federation with monero.town would work for at least a couple more months. Ideally, at some point in the future, the community moves away from federation to a properly decentralized system like nostr anyways.