Some of the x230 configurations shipped with IPS screens, so you can just obtain one of those (or a compatible replacement) and swap it in. The resolution is still 1366x768. Beware of sellers falsely claiming "IPS".

Alternatively, you can do a bit of soldering/modding and put in an aftermarket 1920x1080 panel. https://nitrocaster.me/store/x220-x230-fhd-mod-kit.html