Field Maps does not display any decimal digits in UTM. Recent update lets compass show distances less than 1m but feature location coordinates are rounded off. Search bar also does not recognise if you put any numbers after decimal.
Sincerely
I'm adding to the chat here in hopes that there will be a solution posted. I'm hoping to add UTM display with decimal point precision to the collection window in the Field Maps app. Right now it's just rounded to the nearest whole number.