You should be able to find this information from the Google store.
Tap on your Nest Aware subscription and you can view the payment details from there.
Can you tap/click on your Nest Aware subscription? I can and then I can see my payment method and that has a link that says "View Payment History", if I tap/click on that I am taken to another page from Google Pay that shows my subscription payment transactions.
Do you use Google Pay? If you do then you might find this information there.