RenatoMilagres-4771 There are multiple issues you have mentioned...
1) Not able to see attributes like win version, mc version, where is located: Maybe add more columns?
2) I'm not seeing MAC devices, why? Check to see if this helps.
A: Did you follow the below steps to register MAC devices:
Create a compliance policy
Define a Conditional Access policy for macOS devices
3) I have some devices without owners, how to fix it? There are 2 ways to look at this.
3a. Permissions issue or some other technical issue for why owner is not listed as Owner normally gets updated upon registration of device.
3b. You can change the owner of the device via PowerShell.
To Add the new owner. Add-AzureADDeviceRegisteredOwner -ObjectId -RefObjectId
Then remove the previous owner. Remove-AzureADDeviceRegisteredOwner -ObjectId -OwnerId
You can find the device's "ObjectId" using the following command. Get-AzureADDevice
You can find the owners "ObjectId" in Azure Portal or via. Get-AzureAdUser
You can use the Cloud Shell feature in the Portal to execute the commands or you could install them locally and connect up.
If the above doesn't help, I would cut a ticket for MS to investigate further.