I don't think this is needed now for some reasons,
1.) In the java network you need Iron rank and above to choose maps, so it wouldn't make sense if you could do it for free
2.) This could mess with servers a lot, having to have servers open being able to join different ones at the same time. This definitely would create more server problems with queuing
3.) Cubecraft server queuing on bedrock is buggy already, If you try to queue a team mode sometimes you spawn at middle, sometimes you don't even go on the same team as your teammate. They'd need to fix those bugs in order to even create custom server queuing.
For me this is a no.