US Immigration from Iceland

Hello everyone!

I am a new member so I might put this in the wrong section, admins please move it to the right one if needed.

I am waiting for my 10 years green card to be approved, I have valid 2 years extension letter and I would like to travel back home to Iceland for like 2 weeks and come back .

Traveling there wouldn't be a problem but I am afraid that I might not be allowed to come back in the US due to my vaccination status- I am not vaccinated for Covid and not planning to be.

So I would like to know if any of you have traveled abroad and come back without problems despite the vaccination status?

Thank you so much in advance for your help.

Should we put N/A in blank spaces on the N-400 form or just leave them blank, unless the instructions specifically say otherwise?

My daughter ( older than 21) is due to travel to the US for Christmas from Norway (Schengen area). She will transfer in Amsterdam for Atlanta GA destination. I am getting a bunch of different answers whether she can come or not. CBP, CDC, airlines all have different stories, does anyone have an experience with this? success/failure.. based on Proclimation 9993?