@Guerzoniansus From what I've seen ENT has not started with this yet, if it might become a projekt in the future idk.
but for now if your a map maker yourself and what these things for your map, MMH has this up alrdy no idea how well it workrs but it's there, so Id sugest checking in on hive or maybe just keep posting here in the right topic ofc
( + most map makers alrdy have some kind of forum or have even posted an Email in the loading screen & F9 so that people that wanna help & suport can and are able. even tho this is an old way so you might wanna check the date on the map so that you dont start "spaming" some dead email about a map thats been left alone for 5+ years xD
But as for if they host maps like this I dont really think so but if you manage to get it into the map-pool you yourself can have "Test" games with it