My tv supports 4k and display resolution is set to 4k HDR, but i am not able to record 4k...

you need hdr for 4k output

Actually, you don't.

Uhd and hdr are required for 4k output

You need UHD, in the sense that you need the TV to support 3840 x 2160 resolution, but you don't need HDR enabled to reach 4K. UHD 4K is the amount of screen resolution available measured in pixels, HDR is the ability of the TV or monitor to display more
natural colours.

Note that the Xbox One S can do HDR in games that support such a feature, but regardless of what resolution you set, all games max out at 1080P internally. If the display is 4K, it will remain in 4K, but games will only be upscaled. Only the Xbox One X
can play Enhanced titles in 4K natively.

You should be able to disable HDR, how you disable it depends entirely on your TV. Disabling HDR via the TV settings should not disable 4K screen resolution. Indeed, some Xbox One games do not support HDR, Fallout 4 on the One X can play in 4K for instance,
but it does not support (or indeed have an option for) HDR.

On my Sony Bravia Android based TV, I had to go to the main settings and enable HDR functionality. Even then, I had to set the HDR setting to 'Auto' on the HDMI port I have my console connected to. If you have HDR set to 'On' all of the time, non HDR games
will display the wrong colours, look oversaturated. With 'Auto' enabled, HDR will only operate when it detects an HDR supported game. This may not be a feature of your display however.

What make and model is your TV?

What is the model of your TV? Sometimes, manufacturers disable 4K resolution over one or more of the HDMI inputs, and you must manually enable it in the TV's settings with your remote.

The Xbox One can support almost any TV with an HDMI input. The 8/10-bits on panels only indicates whether the TV supports HDR or not, which is an optional feature. The Xbox One X can support 8-bit 4K displays (considered non-HDR
4K).

If your TV is an 8-bit panel (non-HDR), then make sure the "Color depth" setting is set to "24 bits per pixel (8-bit)" while switching to 4K UHD resolution. You may also want to experiment with the advanced video settings if you
are still having issues in trying to get your Xbox One X to display in 4K.

thanks I saw that QUEENMISFITS. however that's the post i used to get to where I am now. it did not solve the issue for me that I am facing and in that article it states

"On the Broadcast & capture screen, select "Game clip resolution" then select 4K SDR, or 4K HDR. 4K SDR will record videos in a standard colorspace, while 4K HDR will record them in High Dynamic Range,
making them viewable in full detail only by those with HDR-compatible TVs."

So it explains a little about the difference between 4K SHD and UHD color space but not why the saved file is coming out as 1080p when my settings are clearly set to 4k.

"Hey everyone,

Does the issue persist if you were to change the TV resolution to 1080p? To do this, follow these steps:

Settings > Display & sound > TV resolution > Select 1080p

As long as 'Allow 4K' is checked, changing the TV resolution to 1080p will not affect native 4K content from displaying in 4K. After the resolution has changed, restart your Xbox One console and see if the issue persists.

Thanks!"

I tried this, the color degradation of Netflix goes away, however 4K no longer displays as an option for any of the content and it does not play in 4K. Also the issue of cutting out persists through 4k hdr UHD Blueray movies regardless of being set to 1080p,
it does however switch to 4k hdr automatically when playing the discs, but it actually cuts out more than when its set to 4k uhd

4K is about the resolution that is capable, not the power of a system. A 4K tv means its capable and will support 4K resolution. It all depends on if a game is made and supports 4K if it will display in 4K on a 4K tv.