idk mate, maybe in future updates this might be added. But this will be hard to add because of the fact that these guys are not bots, well they are, but they dont count as player.

It does exist I found out, use usual ULX commands but instead of "!" put a comma instead.
Like ,jail ZETANAME length

,ban ZETANAME length reason etc.

If you want more admin commands, here is a list with every current admin command to use on the Zetas.

{} Is a required arg
[] is optional

,goto {Zeta Name} "Teleport to a zeta"
,bring {Zeta Name} "Teleport a Zeta to you"
,return {Zeta Name} "Return a Zeta back to their original position after teleporting them"
,slay {Zeta Name} "Kill a Zeta"
,kick {Zeta Name} [Reason] "Kick a Zeta from the game"
,ban {Zeta Name} [Time in seconds] [Reason] "Bans a Zeta for a certain amount of time"
,slap {Zeta Name} [damage amount]
,whip {Zeta Name} [damage amount] [times]
,ignite {Zeta Name} [time]
,sethealth {Zeta Name} [amount]
,setarmor {Zeta Name} [amount]
,god {Zeta Name} "Grant damage immunity to a Zeta"
,ungod {Zeta Name} "Revoke damage immunity from a Zeta"
,jail {Zeta Name} "Jail a Zeta"
,tpjail {Zeta Name} "Teleport and Jail a Zeta where your crosshair is pointing"
,unjail {Zeta Name} "Unjail a Zeta"

Also if a Zeta has more than two words in it's name dont do (,jail Based Kleiner)
Instead, you could just do (,jail Based).

Yeah I've used ULX a hell of a lot in 2020, my admin days haha. Ty though I hope this helps someone!