Describe the bug
The Unsupported Block Editor does not work on Atomic sites.

To Reproduce
Steps to reproduce the behavior:

1. On a post that contains a block not supported by Gutenberg Mobile
2. Tap the (?) and a bottom sheet is shown
3. Notice there is no option on the bottom sheet for editing the block

Expected behavior
The Unsupported Block Editor should work on Atomic sites.

Screenshots
If applicable, add screenshots to help explain your problem.

Smartphone (please complete the following information):

• Android or iOS, any versions