The Xbox Series S/X both output natively at 1440p so everything looks sharp and great on the monitor. Also, despite being a 1440p monitor, it accepts a 4K/60hz signal so technically, you select 4K as your resolution on the Xbox and it will simply downscale to 1440p.
https://www.amazon.com/ASUS-XG27AQ-Compatible-DisplayPort-DisplayHDR/dp/B08LCNNGZN

