Pixel 3 XL works fine sans phone case reading my NExT.
When I have my Otterbox case on it, it’s pretty thick and makes it a bit more difficult to get a read/write. I need to get a thinner case if I want to read/write easier. Funny enough, it took me a few weeks to realize the phone case was interfering with the process, lol. One of those self-derp moments.