The good news is, both expo-updates and sentry-expo have recently been updated to enable you to use Sentry with EAS Update on SDK 47. This means that you can upload the sourcemaps that eas update generates to Sentry, and when an exception occurs running an update, it will associate associate it with your update, and your sourcemaps.
Additions the docs are in flight here: Update Sentry docs for EAS Update compatibility by kbrandwijk · Pull Request #19753 · expo/expo · GitHub that describe the process and the configuration.
Let me know if you run into any question or issues!