I had this same issue after disconnecting my battery, what ended up working was using that site https://radiocodevault.com/honda/ and then having them send me the unlock code that matched with my radio. Music again, finally…. :) Hope it helps some people out still searching for a solution to this.

That site someone mentioned above, actually works! :D I just used it and got a working radio code. Music again! https://radiocodevault.com/honda/ is the link.