NotePlan is nearly identical in iPhone and Mac, and I believe the iPad app is there too, especially with a keyboard.
It’s a beautiful Mac-assed app, with customizable themes (and syntax!), and a variety of themes available. Templates can be used to customize notes, and even can pull data in from outside the app, and from the web.
It has a lot of plugins.
It not only has a great plug-in system, but they’re being actively developed and improved, as is the app.
It syncs quickly, and runs on plain text files and markdown.
Linking: it uses wiki links with autocomplete, can link to headings in another note, and has a synced lines function (similar to synced blocks in other apps, with some differences; but if you make a change in any synced line, the changes propagate to all its copies very quickly).
There is a URL scheme, so its easy to link in from outside the app – and even better, many (all?) of the plug-in actions can be invoked from the URL scheme – I have a Drafts actions I use to quickly add tasks, bullet points or other material to specific parts of my daily notes. You can even switch display templates using links in the app.
Drawbacks: no tables (unless you make them with tabs ). Doesn’t include some markdown extensions, like definition lists. The text files that contain all your data live in a CloudKit folder, with a weird location on the Mac; so using the same notes with other apps (eg, Onsidian) is very doable, but the notes have to live in that location.
Opinions (as in, an opinionated app): Daily notes, tasks, calendar items and other kinds of notes are all roughly equally important.
I know there was a long thread about NotePlan recently, but there have been some good improvements and since then.