The term you're looking for is "Commercial Signage" or "Large-Format Displays" [1]
This is of course US based but there are other vendors for North America, and I'm sure for EuroAsia and beyond.
You're paying more for the fact that some models are built to last longer, and the fact there's no wireless or smart junk.
> You're paying more for the fact that some models are built to last longer
Not just built to last longer, but built to last in a lot of different environments (heat, cold, humidity, vandalism, vibrations) whereas consumer TVs are optimized to run at 20-25 °C in a home where they will be rarely moved. The QA on the panels is much more rigorous, too (it's the same thing as with Intel CPUs, the yield on panels hitting the standards for commercial signage is lower than your average consumer TV).
Also, you'll be getting spare parts for these in a decade if you need it (or, at the very least, can purchase a new device with identical specs in that time), there will be support from the manufacturer over that time, and more often than not you'll be able to find decent documentation about how to integrate them into whatever you're building.
And: some of these carry amazing features. Some two years ago when I was doing videography stuff for an event, there were four 60 inch full-HD monitors in a 2x2 grid - supplied with one DVI cable for the signal that was passed between them using in daisy chain mode, they were configurable to run in grids of up to 4x4 I believe, and the monitors simply took the incoming signal, cropped their section out of it, and displayed it scaled. Was a hell of a lot of fun playing with them.
You're paying more for the fact that some models are built to last longer, and the fact there's no wireless or smart junk.
[1] https://www.cdw.com/search/Monitors-Projectors/Large-Format-...