We have several checklists that we print off and manually fill out for various projects. We would like to create templates for these and attach them to a ticket type, but our checklists have more than 10 items on them, so templates aren't possible.
There is an existing feature request in here https://thwack.solarwinds.com/t5/WHD-Feature-Requests/Allow-25-items-for-a-check-list/idi-p/558606 to allow up to 25 items you could give it an upvote
The way we solved this, is by working out if these checklists needed the attention of specific techs, and then splitting them up. Your case might not be the same, but we found the following solution:
In our case, we also use Ticket Custom Fields to determine what child requests will be triggered, and have those values in the criteria for the Action Rules. Seems to be working quite well. I agree that it's probably a bit overly complex if you require a single checklist for a tech, and supporting the feature request posted earlier is probably better... but I thought I'd put this option out there in case it helps.