There's always the exhaust for heating hands. A method to be approached with caution.
Yes, see my gloves cooking in top photo. Left too long, the stitching lets go and a finger or two falls off.
Also, hugging the muffler with numb hands leaves one prone to injury before you realize what you've done😊
Purchasing a set of battery heated gloves permitted me to ride to the same areas I visit in the other 2/3rds of the year.
Stig