Adding accents to imported existing font

I have a font where accents are missing and I would need to add them on my keyboard.
My questions are:

  1. Is it possible to import a complete font with Glyphs mini?
  2. Once done will it be possible to export the corrected file back (maybe slightly changing its name to keep the original safe) ready for PAO?
    Thanks for any hint.

Yes, but expect more stuff to do. Think of reconstruction of compounds, expanding kern groups. Most importantly though, it is a legal question, so make sure you have the permission to do so.

Make sure you are using the Adobe Fonts folder for testing:

Great thanks for your quick answer and excellent tip!
Yes actually I’ve seen the complications for this case where it’s just one font I rarely use.
For that single purpose I just created an image of a “grave” to complete the text.
Best Regards