Your friends and family have likely purchased or been gifted a range of new devices over the last few days and weeks, and odds are probably good that you're the go-to for tech support. Sometimes it's easy enough to troubleshoot with a call or text when you aren't nearby, but it's usually helpful to see...
https://9to5mac.com/2018/12/26/screen-share-iphone-ipad-mac/
https://9to5mac.com/2018/12/26/screen-share-iphone-ipad-mac/
