question

Please try manually sync and see if it works.
1. Sign in to the Microsoft Endpoint Manager admin center.
2. Select Devices > All devices.
3. In the list of devices you manage, select a device to open its Overview pane, and then select Sync.
4. To confirm, select Yes.

If it doesn’t help, try to remove the app assignment to one of the device, reboot the client, and then assign it back to device.

In addition, please also check the network connectivity, which may affected by the network security devices, such as Firewall, Proxy, and so on.

Syncing per computer does not work.

On affected computers, those that I've checked, actually have Company Portal installed. And, within Company Portal itself, the [Installed apps] section shows Company Portal pending download.

Company Portal can still be used to pull and install other available apps. So it seems Company Portal or Windows is confused over the installation state.

UPDATE 6 Aug

Every affected colleague we queried so far also reported Company Portal is actually installed on their computer, and itself reports the perpetual "download pending" state in Installed apps section.

Today we observe another weird occurrence. One of the computers previously reported as installed now turns up as pending. Apparently Company Portal cannot reliably keep track of its own installation state.

Given yesterday's situation, one of my colleagues suggest may be because they became pending while attempting to download a newer version of Company Portal. That is very plausible, but of course we don't know how to fix this.

Today we provisioned a new laptop with Windows Autopilot; it got Company Portal pushed thereafter and launches proper. It certainly appears to be a newer version (a new Downloads tab in place of the Installed Apps tab), but again shows that Company Portal itself is "pending download" within.

Intune shows likewise. It appears Company Portal cannot properly track the installation state of itself, thus cannot report to Intune what's really happening?