These are edge pulls installed vertically. Depending on the space between those door panels the sides might have been routed to allow the pull to sit flush with the panel.

I just did a search and it isn't easy to find edge pulls that aren't just a plain tab, so maybe these were custom.

I don't think that's a real picture, I think that is some kind of virtual design.

I have been looking for pulls like this for years

Subzero used to have an edge pull similar to this years ago and I wanted to duplicate this look, but I have not found a handle that wraps the edge like that.

There are door hinges that have handles. I wonder if this could be a nicer execution of the concept?

Like this, but classier: https://www.echhardware.com/product-item/h014/

palimpsest you may be correct.

Fori, interesting. I’ll share with my husband, looks like we’d have to modify the doors quite a bit to fit both hinge plates. That may be a no for him.

I wonder if I could have them 3-d printed 🤔

I bought beautiful handmade bronze hardware for my previous kitchen from this company.

https://www.pruskinhardware.com/

They customized the length of one of their knob designs for my project. They would definitely be able to make something like the pull in the photo. The question then becomes how much time and money do you want to put into the project. I think Rocky Mountain Hardware will do custom projects too.

Not an exact match, but Top Knobs has an edge pull that is similar: https://www.build.com/product/summary/973485?uid=2414514 

But as a previous poster said, it will require some adjustment to mount the pull (whichever one you pick) to the inside of the bifold door so that it is flush.