This isn’t something we support, so the bug report category is not the appropriate one.
Moved to help section.
I am not familiar with droidfs, but simply by reading the first live of their readme
An alternative way to use encrypted virtual filesystems on Android that uses its own internal file explorer instead of mounting volumes.
I don’t think that this is something that is going to work. Obsidian needs filesystem level access to a whole directory (and relative api provided by filesystems, such as real-time file watching). The “uses its own internal file explorer instead of mounting volumes” makes me thing that droidfs doesn’t provide that.