Adding one more comment and upvote here to the masses. I primarily use the desktop app for playback while at work, and some music just requires gapless playback. Please implement!
I left Deezer for Apple Music a few years ago because of this issue. Now I'm back to express my disagreement with Apple's support for the US government. Gapless seems good now on iOS, Safari on MacOS but not within the MacOS App. For example, the transition from NDA to Therefore I Am by Billie Eilish stumbles on MacOS app.