I guess smaller apps would be nice but that’s also a thing that can be helped - I have a handful of flutter apps on my phone right now (that i know of) and they run in at:

18MB - Nextcloud recipes client

50MB - Spotube (Youtube music client with spotify integration)

100MB - My job - a savings and investments app, with half a dozen third party API integrations.

So depending on your scope and stuff you can really build an app to whatever size. Cant account for react native or blazor but the idea is usually just abstract native graphics APIs instead of using a browser runtime.