trying to update using apple devices app on windows 11 pc

I'm trying to update my Ipad from 18.7.1 to 18.7.2 (I am trying 26 on my newer iphone first)

There isn't enough storage on the ipad to do it over wifi, so I am using the Apple Devices App on my windows 11 pc. I'm using the Apple Devices app because I can't find the Ipad on the Itunes app.

The Apple Devices App says the 18.7.1 on my ipad is the current version. So I can't do the update.

How do I get the Apple Devices app to recognize that 18.7.2 is available? (And how can I get it to recognize ios 26 when I take that step?)

The Ipad is an 8th generation Ipad with 32 GB of memory (only 3.5 of which is available, hence trying to update via computer). I have a second 8th generation Ipad with 64 gb of memory which I have updated to 18.7.2 over wifi. So in theory the update is capable of being run on the ipad. And the website says 8th generation Ipads can run ios 26.