Albertsons & Safeway are both listed as options in my gallery.
Perhaps no stores are listed in your gallery because there is not a Safeway/Albertson in your area?
If you do NOT have Safeway or Albertsons in your area, simply search "Safeway" (from the ibotta homescreen). From there, select Safeway as the store you wish to search. I'm guessing it will be available in the Safeway gallery.
Altho I don't have a Safeway on my home turf, I often travel....so Safeway is a store I frequent.