You can undo erasure, with the undo button… But if it was a while ago, you’re talking about a Lot of undoing… Procreate has alpha, but not as a separate adjustment via channels. Each layer has a single alpha that affects paint on that layer.

Is there a Restore tool on procreate?

Procreate’s Timelapse Recording feature is on by default, so unless you disabled the feature the canvas should have an associated recording of your work. Use it as a recovery tool by opening the Actions menu (wrench icon at the top left of the canvas) then tapping Share > Export video.

Why does procreate randomly switch to eraser?

Procreate Brush Keeps Switching to the Eraser. If your Procreate brush keeps switching to the eraser and you have an Apple Pencil 2, make sure that you don’t have the double tap feature enabled. You can turn this off in the Accessibility settings.