From your Route, select the 3 dots in the upper right hand corner and select Route Recovery:

Click into the box that says "Select a Route" which will display a drop down of all available routes to recover:

After selecting the route to recover, select confirm

A dialogue box will confirm the route has been successfully recovered

After restoring the route itself, you can restore the route order from the Master Sequence -

When restoring a version, you can choose to:

Restores the Master Route while leaving existing daily routes unchanged.

Restores the Master Route and updates existing daily routes to match.

Restores stops that were previously assigned to the route but later removed.

While reviewing a restore, the route enters a read-only preview state.

You can review the changes, but you cannot edit the route until you either: