How can I copy photos from my iPhone 8 to my PC without using iTunes? I don't know it they backed up to the cloud and don't have a password for that anyway.
Lost-here, saving those precious memories is important. Typically, you can back up via iTunes or iCloud. I see you mentioned you don't have the password. If you are referring to your Apple ID password you can learn how to reset it here https://support.apple.com/en-us/HT201487.
We do offer another option to back up your photos that does not use Apple's products. Our service is called Verizon Cloud. This will allow you to back up and restore your photos. To learn how visit https://www.verizon.com/support/how-to-use-verizon-cloud/