AppleCare Coverage for Watch

My Apple watch 4 AppleCare coverage expires April 23, 2022. I want to renew it again. My subscription is paid monthly on my iPhone. I searched the Apple website last night for over an hour and found nothing to help me renew, only cancel. Apple may have good products but to find any information other than from this community is horrible. You can't find any phone number to speak with anyone or any clear directions. Can anyone assist me? Thanks