If you’re using a provider that can clone your whole VPS, that might be a shortcut to explore:
Also, this process for a site move using rsync would appear to bring the entire site over 1:1…
Move a Discourse site to another VPS with rsync - Community wiki / Sysadmins
The basic process looks pretty straightforward, though there are many comments offering modified approaches and command parameters. I haven’t done it myself. If I had to, I suppose I’d start with the basics and see how it goes. Several possible gotchas are discussed in the comments.