Not that I know of. Obsidian sync between multiple devices is end-to-end encrypted but it all ends up unencrypted on device. Some plugins let you encrypt sensitive information/notes (Meld Encrypt) - I haven't used it in some time but when I did it was a little finicky.
Some other options:
- Use disk encryption on your devices.
- Install a Linux distro in a virtual machine with encrypted home partition exclusively for running Obsidian. (It's like electron except you're bundling an operating system)
- Use android work mode/insular to isolate Obsidian's files from other apps.