Accidentally deleted audio- how do I relink?

If the audio is part of the RP replay file you can right click in the file in the timeline and choose reveal in project, then bring it back in.

Not sure how this happened but it seems the audio got deleted? how do i automatically restore it?

By @neonmamacita

You must do some manual steps to restore the audio:

• Set the time indicator at the beginning of the clip.
• Press the F-key on your keyboard to do a Match Frame
• Now, use the "Drag Audio Only" icon in the source panel to drag the audio to your timeline that belongs to the video clip.

Check a previous manual save or an autosave project.

You can copy it from that timeline and paste it to your current timeline.