We're having this same issue and we are actively working with support but not getting very far. Not sure how widespread it is or if its just a few customers. This is preventing us from deploying new apps and mobile devices, going on 4 weeks now. For us, ALL apps appear to be affected. Existing devices with existing deployed apps are working fine and updating fine, we just cannot push any newly requested apps to them.
We're also using owner mode with a Meraki managed Android for Work domain. When we log into the gmail account tied to this we can see the apps and they are approved. We have tried removing the apps from there and re-approving them from SM. They re-show up in the gmail account's list but still do not deploy to tablets/mobile devices.
We have also tried removing the tags for some time and re-adding them, this has also not worked.
SM shows that the app was successfully installed, but it wasn't. On the device end we see the following errors:
"There are no apps to install, since your administrator hasn't made any available to you yet."
"Your administrator has not given you access to this item."
Were you ever able to resolve this issue?