Way before Joplin I used to use a note app called ColorNote which had a nice little feature that would let you add a widget to the home screen of your phone which, when tapped, would open the app to that note straight away, it's kind of suprising Joplin doesn't have something similar since this seems like it would be a pretty easy to implement feature (he says with no app dev knowledge tbf so I could be wrong!)
It's a small QoL feature but it would be pretty handy for notes like a shopping list where you may want to just quickly access the note to add an item, that kind of thing!