I had the exact same experience and switched from Tauri 2.0 to Electron after a month.

No only were there UI inconsistencies, but Safari lags behind chrome with things like the Popover API and the build/codesign/CD ecosystem for Tauri is incredibly scattered.

When I was using it, IAPs were still not really an option for Tauri or at least I could not find any docs or resources about it.