Is there any way to build a service from a template that becomes critical if all child items are critical, while the number of child items can be 1-6 not known upfront?

We have a case to monitor multiple bearers (network connectivity) and trigger a service outage if all of them are down (critical). There can be 1 to 6 bearers and these are defined in a table with columns specifying the bearer name, empty if bearer is not used. The bearer name is normally a service name (we monitor each bearer as a separate service), but can also be an element name if needed.
For this we'd need to build a service template that will create a service that will be critical if all child items are critical. However, we don't know upfront, how many bearers there will be, but there will be at least one, so first child is mandatory, bearers 2-6 optional.

Playing with the service template I used the Dynamically Include condition with AND condition for each child element, when each template child element alarm state == critical. This works well, if all child elements exist. However, if the second child, that is optional, does not exist, the first child won't be included in the service, if critical.
Is this somehow possible to overcome?
If necessary, we can also have the number of bearers as a Column in the source data element and then somehow use it in the condition to eg, compare number of active alarms to the number of bearers.

Thanks for any tips. I'm sure someone has already dealt with such case.