Okay so: I have an iPhone 6S, an iPhone XS, and 2 macbooks (one 2014 and one 2017). I have all my devices back up iMessages to iCloud. I have iMessage history going back to before 2016. At some point (I think iOS10/whatever Mac update it was), the message history on my iMac no longer became searchable going back to before early 2017 even though the history on my phone went back to 2016 (not all the way to 2015 for some unknown reason).

I got a new iPhone XS the other day. When we first set it up, there was no history, then when I signed into iCloud, it synced my messages...and it went all the way back to late 2015! However, I accidentally deleted something and had to restore the iPhone to factory settings. I then signed into iCloud and after syncing/downloading iMessages...message search results only go back to 2017.

So I sign into iMessages on my other Macbook (one that I usually just use for work and has a different iCloud ID) using the common iCloud ID. It begins downloading my iMessages but in some conversations is only backed up to yesterday at 7:28 AM whereas others go back a few days but nothing goes back even to 2017.

I KNOW all the messages are still in iCloud going back to 2015 (hence they restored the first time) but how come every single device has different levels of restored/searchable iMessages?

Is there any way in Apple to directly access iMessages IN iCloud somehow because when I go to iCloud.com there's no "Messages" icon on the launchpad but if I go to iCloud storage it shows I have 14.19 gb of messages backed up.

What is going on and how can I force ALL my devices to sync back to the 100% history of messages?