I just applied an OCR rule (from OCR and DEVONThink To Go) to both PDFs and images from Evernote Scannable app, and the resulting PDF+text files have searchable text but I also cannot highlight/copy this text in DT or Preview (but text is selectable in PDF Expert).
Here are my OCR prefs:
I will attach both image and PDF pre and post processing by DT OCR as well. Scannable Document on Jun 17, 2020 at 9_41_49 AM.pdf (692.2 KB)
Post processing: Post OCR Scannable Document on Jun 17, 2020 at 9_41_40 AM.pdf (352.0 KB) Post OCR Scannable Document on Jun 17, 2020 at 9_41_40 AM.pdf (352.0 KB) Post OCR of pdf file.pdf (333.4 KB)