Links like [email protected] should translate to a website when typed in the app in a post, to have the same response as in the web instance (where I typed this). When typing via the app you need to add the correct markup notation. Place text between [ ] and url between ( ), no space between the 2.
When opening the post in the app it's text and it sees the email address notation behind a ! (the community notation isn't recognised as a special case, yet). An auto translate would be nice, but is probably on the 'nice to have list'.
Lemmy been around for a few years, but is just lifting off, as are all apps. With the redfugees coming over, lots of bugs are found, where technical ones have a higher prio. (the amount of traffic that is now generated is only now uncovering them)