LrC Migration Success on Macbook/Partial Succes on iOS?

Recently migrated from LrC to Lightroom. All seemed to go well. Lightroom on my macbookpro (Sonoma 14.6.1) shows all 21,000+ photos in my albums in the Cloud. BUT both my iPhone15Pro  (17.6.1) and iPadPro (17.6.1) include only about 5,600 photos. While all the albums are present, most are either empty or contain only a few photos.  How do I fix this? Why isn't the Lightroom Cloud the same for all three, that is, just like on my macbook?

Perhaps this helps with a diagnosis?:  The Cloud icon on the iOS devices says "Synced and backed-up" (which obviously they are not, at least not fully). However, on the macbook (which actually appears to be fully synced and backed-up), the Lightroom Cloud icon has a red exclamation mark. When I click on it, I get this message box:

Under Connect Your Devices, when I click on the Lightroom Mobile, it tells me that it is included with my Adobe plan and suggests I download it. But it's already downloaded on both iOS devices.  Don't know why I'm getting that message, and maybe it has nothing to do with my problem. Alternatively, if I click on Lightroom Web it takes me to a screen just like I see with my iOS devices. That is, one with only 5,600 photos.

Note: Within LrClassic, the Cloud icon shows this:

This is Lightroom info from my macbook:

Would really appreciate knowing how get my iOS devices to match the 21,000 photos I see when I use Lightroom on my macbook. Thanks for your help, Rob