I live in Canada and have struggled with this every winter of my damn life lol. For what it’s worth, the best solution I’ve found is to buy big boxes of these hand warmers (https://www.amazon.com/HotHands-Hand-Warmers-Odorless-Activated/dp/B0007ZF4OA) at costco, and tuck one in each glove on the inside of my wrist. It makes a huge difference and does keep my fingers warm. I also often tuck one in my boots on the inside of my ankle when it’s super cold and my toes stay warm. It’s wasteful however, since the warmers are disposable. If someone has a better solution for actual heated gloves that work as well I also want to know!