My Apple Watch Series 10 is not measuring my wrist temperature

Had my Watch10 for around month now & despite my Watch saying in the vitals app when I first got it ‘5 Sleep Sessions Needed’ it’s still showing this after a months use?

This feature was one of the reasons I upgraded from my Watch6 so disappointing I can’t get it to read. The vitals app recognised I was ill a couple of weeks back when I had a severe cold, noting respiratory & breathing issues which was quite impressive.

I have Wrist Temp enabled but it’s just not recording it… ??

Thanks

Ed

[Re-Titled By Moderator]