How to get online support chat

Click here ➜ https://getsupport.apple.com

Then go through the steps to identify your issue, and at the end if available for your issue, under "Get more Support" the options for Chat and/or Call should be presented.

if you have an iPhone or iPad, there is an Apple Online Support app that many find easier to use than the phone-line "triage" system. It is here:

https://apps.apple.com/us/app/apple-support/id1130498044