THIS BUG IS PRESENT since the update to InDesign v20.0.
Menu: InDesign > File > Adobe PDF Presets

After updating to InDesign v20.0 Apple Emoji characters are NO LONGER SUPPORTED in the names of "Adobe PDF presets"!
After many years of functioning perfectly, now with version 20.0 Adobe dropped support of Apple Emoji characters in"PDF presets", resulting, that "PDF presets" can no longer imported to the latest version of InDesign!
Symptome 01: after updating to InDesign 20.0 the existing presets with names containing Apple Emoji symbols are deleted.
Symptome 02: When trying to import previous "PDF-presets" ith names containing Apple Emoji symbols, these DO NOT IMPORT into InDesign 20.0!
Symptome 03: In InDesign 20.0, when creating new "PDF-presets" Apple Emoji characters in the preset name after saving the preset it just disappears without trace!