Can you use a displayport on the xbox series x?

There's no HDMI 2.1 to Displayport 1.4 adaptors available as of yet,

There are Displayport 1.4 to HDMI 2.1 adaptors available, but the signal only goes one direction and the Series X does not have a Displayport,

also with adaptor you run the risk of getting higher latency input, lower refresh rate, poor image quality,

for a clean bandwidth signal, it's best to connect straight HDMI to HDMI or Displayport to Displayport.

Does it help or make it better if i buy an apdaotor and plug the display port into the xbox one x

No, adapters can make thing worst for you and are pointless to use, You always want to connect via HDMI to HDMI or Displayport to Displayport for the best outcome, never go HDMI to Displayport.

I'm saying that HDMI to displayport adapters are pointless to use, and if you were to use one , you'll still only be getting 60hz.

you want to connect the HDMI port of the Xbox console to a HDMI port on the monitor or TV for the best outcome,

because the Xbox One X does not have a displayport on the console, you can't go displayport to displayport,

so the only choice is HDMI to HDMI, i personally would not go HDMI from the console to displayport on the monitor via an HDMI to displayport adapter,

when connecting to a monitor it's best to go straight...

HDMI to HDMI

or

Displayport to Displayport

never

HDMI to Displayport via an adapter.

Make sure also that the monitor supports, HDMI Displayport 2.0 as that what the Xbox One S and Xbox One X use, I believe that the standard Xbox One only uses HDMI Displayport 1.4,

Its possible that the monitor only supports HDMI Displayport 1.4,

Its possible that you're TV has HDMI Displayport 2.0, which could be the reason it works on the TV but not the monitor.

I dont think the Scarlett comes with a DisplayPort. There are no TVs with this Port. You can use an HDMI to DP Adapter to use it on your Monitor