Hi @JPMoo,
Obsidian uses markdown files (GitHub Flavored Markdown, GFM); Org-roam uses org files.
So you would need to bridge them.
One way to do this is to use a tool to convert .md files to .org files. A Roam migration tool is mentioned in the Org-roam official documentation; I have tried it on Windows. Since Roam exports into .md files, this tool should be useful for Obsidian.
You should also be able to use Pandoc to convert from .md to .org files.
Lastly… For markdown files, I use my unofficial plug-in for Org-roam that enables it to directly work with .md files – no need to convert from .md to .org files; I call it Md-roam. This is for my personal use, so it will likely feel rough around the edges, and I cannot provide the excellent level of support that Org-roam project has been doing. But apart from that, you are welcome to try it out. I will try out Obsidian, and see if Md-roam can borrow some ideas from Obsidian – e.g. ![[filelink]] and [[internal link]] sytanx.