When I tried the joplin app 9 months ago, the mobile app on iOS was just plain broken.

As far as E2EE note apps with mobile and desktop apps that sync go when I last looked in 2020, you have Standard Notes, Joplin, Inkdrop, Amplenote, Day One and DevonThink. I tried out Inkdrop seriously, but it wasn't better enough for me to switch and was more expensive than standard notes.

A lot of these apps are $5/month, and I feel like that is too much compared to the $3/month far more sophisticated utility apps like 1password are sold for.