I too use 1Writer on my iPad Pro to interact indirectly with Obsidian. I use Apple Shortcuts to have 1Writer create markdown files in a 1Writer folder that is also used as an Obsidian Vault location. I have created Shortcut templates for various Zettel styles. I’m using the Jump app on an iPad Pro to connect by WiFi to my MacMini in order to use Obsidian ‘directly’ from other rooms in the house. In addition, I can use the same setup to connect to Obsidian directly thru WiFi from ‘outside’ my home WiFi. The experience is obviously dependent on WiFi speed. So, for now I can be patient until the Obsidian Devs do their magic with their mobile solutions.