This leads to an interesting situation.
On the desktop we can do all kinds of fancy stuff. On the mobile we are limited.
Personally, I do not use the mobile for extensive note taking/editing anyway, but I would like to have access to (view) the information in the notes.
On the desktop I can use a plethora of fancy note taking/editing tools. On the mobile I can use a plethora of simple note viewing tools. Several tools exist that allow me to share desktop and mobile notes. If you're privacy minded you can use a private cloud like Nextcloud. Otherwise use Drive, Dropbox, etc.
I'm not sure anymore what the added values of Joplin are compared to e.g. NextCloud Notes and QOwnNotes.