What I do know is that with Apple Shortcuts I have designed a template that creates and opens a note/(Zettel) with Tags and Headers in 1Writer on my iPad Pro, immediately. It is then available in Obsidian on my MacMini whenever I get to it. Each, 1Writer and Obsidian, are synced to the same folder in iCloud. And, 1Writer has a Widget. YMMV
No, I’m using iPadOS 14.1 Public Release. If you have 1Writer installed, on the Home Page swipe to the bottom of the Widgets list, select edit, select customize, scan down the list for 1Writer (if it’s not already in the top section list select the green icon to add it to the available selections, then add it to the Home Page list.
This is definitely doable. There are iOS apps that allow you to set-up 4 custom lockscreen icons. You can set up one of those icons to open an URL - and that URL will be obsidian:// something, opening up Obsidian app on the phone and going straight to the daily note.