So you say “programs like Trilium”. Have you looked at Joplin?

Joplin comes with OCR albeit for search only. I myself have not tried it yet, but Joplin itself is a great note app.

Also Joplin seems to have an in development plugin for extracting text via OCR.

Maybe you can then export it to Trilium, if this a one time thing.

That WordPress article is a one-sided mess and they should really pull back from what they did. That has nothing to do with open source. They fucked over many of their users just to spite a single firm (which were in their right).

Now I don’t want to defend a for profit company that doesn’t contribute much to open source, but the public meltdown that the CEO of Automattic had was more than embarrassing.