Monitor for Xbox S Help

Ok. I’ve picky teen. I’m needing advice for a monitor. It will be used for a PC  (Homework ha!) and xbox series S. Budget is less than £250. Ideally need I think 4k, HDMI 2.1, 27 inches, 2 hdmi ports and at least 12ohz refresh rate. Any recommendations, as there seems to be so many options!! I’ve access to Costco and student discounts if that helps……

Xbox S doesn’t do 4k, just 1440p if that helps?

Our also picky teen was very happy with this, not 4k but I’m not sure that is really necessary at this size (?)

https://www.lg.com/uk/monitors/gaming/27gq50f-b/

I’ve used this for 6 months on my PC and happy with it. I think it would be a good match for XBOX duties.  It’s at an even better price now too –  MSI MAG- Amazon

Does it nees 2xHDMI, or can you use 1xHDMI for the x-box and Displayport cable for the PC?

This is £185, but Dell do student discounts on top of that, I can’t remember how much they are.

EDIT:  It doesn’t have built in speakers  – one thing to watch for with gaming monitors is they often don’t have built in speakers, so that could be a problem for the xbox?

https://www.dell.com/en-uk/shop/dell-27-gaming-monitor-g2724d/apd/210-bhtk/monitors-monitor-accessories