First, did I understand the plan? You posted it as:
If you built a new Pi, then you might try document:
Previous machine is still available
which says you can just move all of the databases. I’m questioning that plan.
Long version of the question can be seen in my link to unanswered question:
Database Encryption Changes (2.3.0.1 release note – first written for 2.3.0.0):
If no secret provider is configured, and a default secret provider is available, the database will be encrypted with a random password stored in the default secret provider.
which probably means that Duplicati-server.sqlite is no longer guaranteed portable.
This has your job definitions, schedules, etc. I think the job databases are portable.
I’m thinking that the user manual should be updated as needed for new procedure.
Possibly you can just create an export of all jobs, and keep those somewhere safe.