As the Pixel 2 supports OTG, you should be able to attach a usb mouse to it to navigate through the menu. You will need an OTG cable for this, which is available for a small price in your favorite shop if you don't have one yet.
Hard reset your Fire HD10
Press vol up and power key at the same time for around 5-6 seconds
Follow this video if you're stuck somewhere.. https://www.youtube.com/watch?v=ayvWAyftosw
Comment if you're still stuck