iMessage won't sync between iPhone, iCloud, Macbook after upgrading iCloud
I have looked through all the usual tips here. My iMessage app on my Macbook and on my iPhone are both set to sync (have manually clicked "sync" a few times to be sure). On my MacBook, AppleID preferences are set to include all my various emails & phone #s as "reachable" and iMessage is set to sync in "iCloud" settings. When I access my iCloud at https://www.icloud.com/, iMessage does not appear and there doesn't seem to be any way to add it from there.
I am seeing messages from only certain family members on all devices, but not from other iMessage users, and certainly not from non-iMessage SMS users.
All this worked fine before I upgraded my iCloud storage. Help please!
iPhone XS