It's not necessary
With exporting a clip (instead of merging), it don't need to update the waveform with f5.
Then, edit the clip's properties and set the new path to the externally edited reverse audio.
I'll use Kwave for things like this.
1 Export clip form
2 Copy path and OK
3 Open Kwave
4 Open file and paste path
5 Invert
6 Save and close
7 Properties of the clip to replace
8 Paste path and close
It's not necessary
With exporting a clip (instead of merging), it don't need to update the waveform with f5.
Then, edit the clip's properties and set the new path to the externally edited reverse audio.
I'll use Kwave for things like this.
1 Export clip form
2 Copy path and OK
3 Open Kwave
4 Open file and paste path
5 Invert
6 Save and close
7 Properties of the clip to replace
8 Paste path and close
That's acceptable.