Working out & Music on Apple watch series 5

Hello girokastrit.

Welcome to Apple Support Communities.

If I'm understanding correctly, you would like to see your Music controls on your Apple Watch face during workouts. I will be glad to assist.

Let's check to make sure that the Music complication is set. Here's how:

Customize the watch face

"Add complications to the watch face

You can add special features—called complications—to some watch faces, so you can instantly check things like stock prices, the weather report, or information from other apps you installed.

1. With the watch face showing, firmly press the display, then tap Customize.
2. Swipe left all the way to the end.
3. If a face offers complications, they’re shown on the last screen.
4. Tap a complication to select it, then turn the Digital Crown to choose a new one—Activity or Heart Rate, for example.
5. When you’re finished, press the Digital Crown to save your changes, then tap the face to switch to it."
6. 

Cheers.

I noticed this too - it's a change in the workout app (and has nothing to do with complications on a watch face). The last few versions of watchOS would stay on the "now playing" screen during a workout. Now with watchOS 6, it constantly reverts to the workout screen even when music is playing. It's annoying, because 90% of the time I want to look at what song is playing, not see my calorie count or heart rate.

I've looked for a setting to change this behavior, and found nothing. The setting to "auto-launch audio apps" only works when not using the workout app (when that's turned on, the behavior of the watch does a complete 180° shift depending on whether you're using the workout app or not).

I'm hoping it's a bug that will be fixed soon, or that they add a user preference to change it.