Currently under Services section the only possibility to add child services is doing it one by one, which can take a lot of time on large enterprise setups

The suggestion is to massively add child services based on host groups (the same trigger for all hosts in a group) or using some kind of filter or pattern.

Another nice option here will be a possibility to create some kind of "dynamic" child group, which is linked to host groups and the elements are changing accordingly to changes in the host group.

At the moment the only way known to me how to have such functionality is by using Zabbix API, so it would be nice to have it out-of-box in Zabbix Frontend.