I have idiopathic camptocormia/bent-spine syndrome and also hyperkyphosis due to DISH (diffuse idiopathic skeletal hyperostosis) in my upper thoracic and cervical spine. So I, too, am looking at the floor or ground when I'm standing or walking.

In my house, I am using a U-Step platform (upright) walker. It allows me to regain the sensation of standing and walking almost upright, and my weight is borne by my forearms and not my hands or wrists. It's very large, tall, heavy, and bulky, so totally unrealistic for me to use out of the house. I believe this is it:
https://www.ustep.com/platform-u-step-2/ .
My Medicare plan paid 80% of the cost.

I needed to find a lightweight assistive device which I could load into a small car and use away from home. I'm no longer strong, plus I'd had surgery on both wrists likely due to using canes and sticks before (in an attempt to pull myself upright).
Like Dennymt who commented before me, I decided to get a byACRE Carbon Ultralight.
https://shop.byacre.com/us/carbon-ultralight-rollator.html
It wasn't cheap, but I've found it worth the expense, which I bore myself.

However, the handles aren't meant for someone who needs a true platform walker, so I still have to lean forward. But it's much easier on this person with camptocormia than walking unassisted is. It also gives me a way of pulling myself momentarily more erect, should someone address me and I need to respond as a quasi-upright human being looking someone in the face.

byACRE also has a couple of other rollator models which you might want to consider.

Best of luck! I wish there were a true lightweight platform rollator which would look classy and allow us to walk outside looking like members of the human species (and, speaking for myself, not like some strange heretofore unknown species of quadriped). If you find such a walker/rollator, please do let us know.