So, I cannot speak to the titling process in other states or countries but this is the process I successfully did to get my 818C registered in GA as a 2020 Factory Five 818 ES Roadster. It’s a daunting task when you’re starting it, but mine went surprisingly smoothly.
Items required to pass state inspection
Officially listed process from the DOR: https://dor.georgia.gov/assembled-and-unconventional-vehicles
All of this worked for me and I based my process from a write-up by forum user Hindsight here: https://drive.google.com/file/d/1jQvGmaj8k9Y6jH4fv9mzufQG-4xrYAVz/view?usp=sharing
Sending in your appraisals before they ask for it does indeed save you one round trip of DOR communications.