Neither option is good, tbh. Hook under allows better grip for those capable, but doesn’t allow for some disabled people. Step on increases the likelihood of usability but also increases the likelihood of becoming unbalanced and falling.
Both options ignore the possibility of broken toes when someone on the outside attempts to push the door in at the moment you’ve got your foot planted on it or hooked under it.
We live in an era where automatic doors and push buttons to open them are a well established thing. Do that instead.
Barring that, the hallway with two turns like Walmart uses is an option. Just make sure they’re wide enough for the widest wheelchairs and power chairs, and the turns are too tight.
Counter argument: having to hook your foot runs the risk of damaging the tops of your shoes (often softer material) or your foot if you’re wearing sandals. You can be sure that the bottoms of everyone’s shoes are designed for at least minimal impact protection.
I like the foot step and use them when I can, but it helps to reinforce that the paper towel with a well-placed trash can is the best method imo.