Apple Notes gets inter-note linking in iOS 17, among other features:
I’m also impressed by Notes’ addition of internal linking to other notes. The update should allow for vastly better organization of information in Notes. I’m envisioning it as a solution for our internal documentation needs at MacStories, along with project management and a lot more. I’ve used Notes for that sort of thing before, but once a note reached a certain length, it became hard to manage, especially on smaller devices. With internal linking, I expect that will be a thing of the past.
I use Notes to dump all sorts of data for later processing, the way I used to use Evernote for a decade. I also use it to store medium-term data, such as working notes for an ongoing project (anything longer term is open formats like plain text or MS Office). I expect to use inter-note linking for these project notes quite often.