unable to set high quality voices on Apple Watch

I recently got myself an Apple Watch Series 3 and I have an iPhone SE running IOS 11.3.1. When I set up my Apple Watch, the voiceover voice was set to the standard, low quality voice in my language. For some reason, I can't seem to change it to the enhanced voice. I go in the Apple Watch app and go to general and accessibility and voiceover, and there's nothing over there about changing the voice. For example, I have my iPhone set to Finnish and, of course, the Apple Watch was set to Finnish as well, but rather than the enhanced voice I use on the iPhone, it went straight to the standard, low quality one. I'm guessing I can't change the voice on the Apple Watch then? There's nothing about selecting voices in voiceover settings, just voice rate and volume but nothing else. Or, i wonder if we can do it from the watch itself?

Forum: 

You can’t

Unfortunately, you can not use other voices than the default, compact one, so for english US it will be Samantha compact and I use Swedish with the voice Alva.