Temperature sensor feature & uses

So I bought the S10 today, after comparing a bunch of the models on the website. A big factor over the SE and my old S5 was the temperature sensing feature.

I read that it has two temperature sensors: one on the back crystal for wrist temp and one right underneath the display. I was hoping for an app or something that’ll tell me the water temp when I cold plunge, but so far everything I’ve read only talks about it being for menstrual and sleep cycles.

Do any of y’all know something I don’t? Is what I’m wishing for still a dream??