Mongobot, thank you and this is exactly what I was looking for! I know where this is since I often have taken the Keikyu line.
I especially appreciate you taking the time to insert the pictorial map.
Searching more I do see the google map with this location pinpointed--but it just didn't match to the Haneda terminal map which threw me. I found additional pictures that even show the escalator down to 2F with the Keikyuu signage.

I guess the official Haneda terminal map is not current. I also found a listing of shops and services as of 8/31/2023 and this 7-11 wasn't listed on there either which is odd.

Hopefully my flight will be on time so that I can go get my stamps and then do the secondary before they close.