I'm curious if the Series X will give me more access to my monitor's settings for display...

As mentioned above, your monitor likely won't support what the Series X needs. Often the refresh rate is slightly different (due to different standards being used)....the Series X needs an exact 120Hz setting to run whereas the monitor may actually be 119Hz so it won't work.

If you have access to a computer or laptop, plug it in to the monitor and then got to Windows settings, click on "System", then "Display"...scroll down to "Advance Display Settings" and click it. This should display your monitor along with the refresh rate it will display. See whether it is displayed as 120Hz or 119Hz

The series X is HDMI 2.1 and my monitor is only HDMI 2.0, I was told the display port cable would transfer more data? My monitor is LC27G55TQWUXEN

Hi, Casper. My name is Ron, I'm an independent advisor. I will be more than happy to help you.

The 144 Hz monitor should work fine with an Xbox Series X console. Make sure you set the refresh rate properly in the Xbox Series X settings.

Yea my monitor info says it’s displaying 1080p 135khz/120hz in the display information in settings and it looks and feels awesome I was just curious since I have freesync premium turned on in the monitor settings itself if it still is refreshing the rates even though the Xbox specific setting isn’t on cause the DisplayPort to the monitor itself offers up to 1080p 240hz variable refresh rate through the freesync option in the specs of the monitor

Hi,

It would seem so looking at this
link direct from Dolby. And I'm sure the same would apply to HDR 10 as well.

Since the series is designed to be a 1440P (2560x1440) console, it would be a little silly on Microsoft's part to not allow HDR on Series S/X on none 4K displays.

I'm still at a loss as to why they don't allow it now on Xbox One X. There's no technical reason for it's absence, HDR itself isn't reliant on a 4K resolution to function. The monitor I use for my PC is capable of HDR and it works fine at 1440P on my gaming
PC. My One X doesn't see though.

I'm pretty sure this will change with Series X/S with more and more players opting for gaming monitors with 120Hz refresh rates and freeSync support. 1440P monitors are very popular for cost and performance.