There is nothing preventing apps from providing a registration flow. For example Voyager has it. I suppose the problem is again which instance to choose for signup. You can discuss this in https://lemmy.world/c/boostforlemmy or https://lemmy.world/c/lemmyapps.
As for multiple Lemmy apps being available: Most of the current Lemmy users came here in 2023 when Reddit locked down the API and killed third-party apps. Thats why a lot of apps are now available, and everyone can decide for himself which one he prefers.








That is true. I made a post just now to gather suggestions for improving the website, please have a look and comment if you have any ideas: https://lemmyverse.link/lemmy.ml/post/41719890