Not sure if it includes everything you've mentioned - but for iPad I found GoCoEdit to be about as "killer app" as it could get for an ipad code editor. I mean it blew me away. Not the developer, not associated with the dev or company - I just truly think its a wonderful editor.
Yes -- I've been using GoCoEdit for a long time! I love it. It's a really heroic effort.
But Visual Studio Code's remote thing really is on another level -- you can do things like run the git session remotely but with the GUI-side tools, do find and replace on the remote side; all the extensions (PHP syntax stuff etc.) install and run on the remote side as well as they do locally etc.; it's almost completely seamless.
