The frozen and perishable stuff you can deal with immediately.
If you have any bleach and a spray bottle, make a solution of dilute bleach spray. There are probably recipes on the net for this. I repurposed spray bottles to have a few. You can also use lysol if you have it.
Spray the bags down, especially the handles.
Using gloves or a wipe, remove the perishables and place them on the sidewalk. Spray the outside of the perishable packages and let them sit for 3-4 minutes (remaining damp).
Roll them over and spray the bottom.
Wipe down and place in freezer/fridge.
nonperishable stuff can sit for a week or 10 days. IF you have a large cooler type thingie, put it in there to keep ‘many legged friends’ out. Otherwise, spray down the bags really good and stash them, unpacked, for a few days. Make sure you don’t inadvertently touch the packaging while moving them. Wear gloves if you have to and I use hand sanitizer on the gloves before I remove them.
YMMV, of course.
We haven’t dealt with grocery store in a while but this is what we did the very last trip we made.
Since then we’ve gotten a few boxes delivered.
I spray them down on the driveway and leave them for 15m or so, spray them again (need to make sure they remain damp), roll them over, ditto ditto. Let them sit another hour or so and then let them quarantine in my garage for 10 days or so.
By the time I got done with all of that, I could have gotten the disease, pushed through it and gotten over it already.