Shazam link to Deezer not working on Android and iOS

You're actually right @Not your Dream 

Our devs have confirmed that, if you have an Apple Music account or have linked a Spotify account, the 'open in Deezer' link won't show up. That's due to the update Shazam released a while ago, so not on our side.

At this moment, Apple is unable to provide a better integration with Deezer, but we'll continue to engage with them to get this improve in the future