New Voice Feedback workout alert volume in watchOS 8

When I am running, the apple watch workout app is reading out some statistics every kilometer.

THIS read-out has a very LOW volume.

I tried to increase the siri volume by saying: Hey Siri, increase your voice volume.

This worked, Siri is speaking louder now. But the read out from the workout app is still the same low volume.

Is there a way to increase the volume of the apple watch workout app read-outs?

Best,

Martin