The battery and the kit together cost $50. The kit seems to cost about $7 based on the price of just the battery: https://www.ifixit.com/products/google-pixel-6-battery-genui...

The replacement guide suggests about an hour to complete the task. https://www.ifixit.com/Guide/Google+Pixel+6+Battery+Replacem...

For contrast, some people need YouTube videos with step-by-step instructions to even open the hood of their car. They will take far longer to replace a car battery than it took you. Likely they'll also need to purchase a screwdriver.