Same issue, iPhone XS owned from new, no replacement parts. At first the screen was all buggy and glitchy so I entered DFU and wiped it. Aftrer restore still glitchy. I then used the recomended workarround of accessability bla bla and it seems more responsive but there is a secondary issue. There is a complete void down the left hand side of the screen. I opened a photo and in edit mode I can colour the whole thing in bar the left 5-10% of the photo. There is no way I have damaged touch this is absolutly a software issue like the touch area is incorrectly configured.