rubix1138 There's no way to recover deleted files. It's not generally possible even with root due to the per-file encryption keys. Apps can implement Trash API support to put files in trash instead of truly deleting them but it's not broadly adopted and even the AOSP apps used in the OS don't include support for it. We haven't support for putting files in trash instead of deleting them to our own Camera app because it wouldn't make much sense without the Files and Gallery apps having support for it.
As a side note, I was surprised that GrapheneOS doesn't have an easy way to enable root access. What's the latest way to root (running on a Pixel 8 Pro).
There's no way to do that while using GrapheneOS. It requires heavily modifying the OS and you won't really be using GrapheneOS anymore if you replace the core of the OS with a rootkit destroying huge parts of the security model. Ripping apart a bunch of the core security model and giving root to a huge portions of the OS or even apps goes against what GrapheneOS is trying to accomplish. The proper way to implement features is following the principle of least privilege and giving only the minimal access needed to an isolated component. We do not take insecure shortcuts here.