I have mobility issues so I take a length of paracord or two shoelaces tied together to double thier length in my “personal bag”. I tie a loop on one or both ends.

When I sit down, I haul it out, run the loop under a strap on the bag, then run the free end through that so I now have a line on the bag I can use to pull it up to myself. I stuff the free end into the seat back pocket and try to tuck it away so a flight attendant doesn’t need to give me a hard time.

Then the personal bag goes under the seat ahead of me and I can reel it in whenever I need something.