Hi, I know I am late to the party on this one and apologise if you have sorted it out. I was sure there was a way via file explorer to add metadata to a WAV file. I didn't have much luck with the methods shown in the article I read. It was using Groove Music, but essentially Windows media player can add some information. Not ideal. Plus the windows explorer method is not ideal as it will only allow you to edit the metadata of an MP3 file. You could use Audacity to also edit metadata but I wouldn't recommend them with all the telemetry they are collecting these days.
Then I remember that there are other methods. My preferred method (because it seems you can add artwork) is to use Foobar2000. (Yeah, a third party tool but it works.) Any way, install Foobar and it should find your music. Once the track you exported is in your Foobar playlist, you can right click it and select properties. There will be four tabs - Metadata, Detail, Replay Gain (ignore this for now) and Artwork. Metadata has all the usual suspects but the artwork tab is interesting because you can add artwork for the front, the back, the disc.
Anyway I hope that helps some.