Through the early access and beta periods there may be some issues which we are aware of but have not yet resolved, where these are user-visible they may be noted here - and removed when they are fixed. See also the Changelog for recent updates and resolved issues, and the Roadmap for current and planned development.
In some circumstances, the app is unable to detect whether filter changes (search, sort, layout, etc) have been made to a View and this results in the Save buttons being always enabled. They should automatically enable/disable based on whether any View changes have been made.
Until this is resolved, ignore the Save buttons unless/until you wish to save changes to a View.
Installable web apps do not support being a "share target" for sharing content on iOS/Apple devices. A native app, delivered through the Apple App Store, is in development and once released will resolve this issue.
The workaround in the meantime is to copy+paste content into Notomaton.