First, I understand Adobe will no longer be supporting Type 1 fonts as of January 2023.
I use an Adobe Preflight setting that flags Type 1 fonts with a warning message, “Text uses Type 1 font”
I have a whole library of documents that use Frutiger OpenType. I’ve triple checked these InDesign files to be sure there are no Type 1 fonts. After exporting the InDesign files to PDFX, then running Preflight in Adobe Acrobat ProDC, the preflight shows a warning that the Frutiger font is Type 1. It's not. I checked each font name to be sure InDesign didn’t somehow replace the OpenType version with a Type 1 version and, no, the name correctly matches the OpenType font name.
Why does Adobe preflight think the Frutiger OpenType font is Type 1?
What will happen after January 23 when Type 1 fonts are no longer supported?