I was able to get activation lock removed on 2018 MacBook I purchased off eBay this way- I took it into an Apple Store to get its keyboard replaced under warran

I was able to get activation lock removed on 2018 MacBook I purchased off eBay this way- I took it into an Apple Store to get its keyboard replaced under warranty and they just asked me to produce the eBay listing with the serial number visible and my shipping address on the order.