When using field from trigger in automations- upon mapping the checklist field- it doesn't give you the option to use trigger values, but only create your own.
Here was the process:
1) Have 2 compatible Apps (Same Fields)
2) Create Trigger
3) Create Automation- Upon firing-> Create new records in second App
  • In the automation set up
- Map the fields
Ex: date- Trigger date
Ex: Content- Trigger Content field
Ex: Title- Trigger Title Field
When Selecting Checklist-> instead of being able to use trigger information it only allowed new created options
See image