Just throwing out an alternative workflow that doesn’t need a plug-in …
I threw that one OCR solution together for fun, but ultimately decided to not store PDFs in Obsidian.
Only content I write goes in Obsidian.
Reference material, PDFs, etc all go in an external tool (DEVONthink) and I just link to it from my markdown notes in Obsidian.
DEVONthink can index obsidian’s vault too so I still have a single place to search, including PDF contents.