I get that this guide contains what you're concerned about (updates to service worker.js) but honestly following this guide was incredibly easy and worked right off the bat: https://whuysentruit.medium.com/blazor-wasm-pwa-adding-a-new-update-available-notification-d9f65c4ad13

In addition, even the standard pwa documentation suggests updating it as necessary: https://learn.microsoft.com/en-us/aspnet/core/blazor/progressive-web-app/?view=aspnetcore-9.0&tabs=visual-studio#background-updates