I just took a look at the sharing option on wavlake. does it even create a nostr event? I don't see an option to share an nevent1. Maybe I just don't see the option. Either way, if they create a nostr event when you upload music then you can also create the event manually via a console.
For example, the zapstream frontend is down so I created the stream event manually last night and pushed it to the network. You should be able to do the same with wavlake IF it is an actual nostr event. In my case I added the .m3u8 link for the self-hosted stream. For wavlake it would be the link to wherever you host the tune you want to publish.
