Playing games/movies at 10bit (color depth) in SDR (Not HDR!)?

Question

Video cards

Good day
My question is directly related to the topic of image generation and output

Is it possible to play data in 10bit sdr (I want to buy an ips qHD 10bit monitor !!! BUT WITHOUT HDR mode)? only if there is an hdr controller in the appropriate monitor mode and supported within the content itself. However, I found data that rendering of 10 bits (and more) can be enabled in the video card settings. But then the question arises, will this setting affect somewhere? There are several hypothetical scenarios:
1) Without hdr mode, 10 bits with this setting will not turn on anyway;

2) Or they will turn on, but even with 10-bit rendering in games, nothing will change anyway, because at the very software level of texture rendering, the algorithm today works at such a resolution that shades wider than 8-bit coverage are not generated. How would it turn out that the video card really creates an image in 10bit format, but the real differentiation of the software algorithm itself is 8bit. Here is an analogy of what I want to explain, but with screen resolution: as if we were comparing a full hd and 4K image on monitors of the same resolution and video cards would give the corresponding resolution, but the content metadata itself would be primitive relative to the upscale in resolution: Paint, minecraft , an image of Malevich's square. And the difference in resolution would not be noticeable.
If the same is true with the depth of shades, then in this case the ability to reproduce 10-bit moniks is, if not applicable in the present, but a potentially significant skill in case 10 bits are clearly introduced into the “digit” of the content itself. But then it’s not clear how things are with films and photos, because there is already shooting on 10 and 12 bit cameras, so the content should be in this format? In this case, where can I find movies / photos in 10bit format and will they be displayed in sdr (that is, without hdr mode)?

Thank you for the attention paid to my "sheet".
Sincerely

PS "Why not just take a steam bath and start a monitor with hdr support?" : I believe that hdr 400 is just a marketing feature, since min. 600 nits of peak brightness + local dimming + direct backlight, which you will not find in monitors available on the market. And the HDR mode without these conditions only distorts the native image in a worse manner.