I’m using Editorial on iOS (https://apps.apple.com/us/app/editorial/id673907758) as my mobile client for Obsidian (there are some workflows linked on this forum to create/follow links etc. here: https://tekacs.github.io/editorial-obsidian/) so although Taskpaper support sounds good it would not wholly solve this for me… the file ending for Taskpaper files in Editorial is .taskpaper so it would require some work by the App Developer to allow .md files to display/have Taskpaper functionality too… Please do consider this for the official Obsidian client.
BTW, I really like Roam’s TODO and DONE filters - could we please at least have something simple like this that is shown in the interface that would make finding tasks easier than searching for “- [ ]” !
[Re: DONE: I did notice an oddity in Roam though where completed to-do’s are shown against the due date whereas they really should show on the completed date…]