Also, if you have access to the audio tracks from Rock Band (for example you see plenty of examples of Beatles isolated this-and-that on YouTube thanks to Rock Band).
I've tried a few sites that show up in a search for ai stem separation. Some work pretty well for rock music.
If I recall correctly, https://vocalremover.org/ worked pretty well. Though, it's pretty limited in the free tier and only allows payment via patreon. I never tried the paid version because I don't have a patreon account and don't want one.