Google announced that the newest preview for the next version of Android would be made available on a total of 21 devices, including the more recent Pixel phones. Therefore, a relatively large number of users may have gained access to it already. Unfortunately, some of them now report that using Google Pay as normal is impossible while running this beta.
https://www.notebookcheck.net/Some-Google-Pay-users-find-the-latest-Android-Q-beta-is-not-daily-driver-ready-the-hard-way.420411.0.html