Welcome. Consider using Make custom macros that replace themselves with their value on first run. It is not quicker out of the box, but it can be made so, e.g. compare:
- this:
\n* [ ] first\n* [ ] second\n* [ ] third\nrepresentsshift + enter
- with this:
{{c3 first,second,third}}- Depending on your scenario, you may get away with just a single comma for every extra entry.