Yes, you can connect the AirPods 4 to your iPhone and a PC at the same time, for example to hold a meeting in Microsoft Teams, but there are some limitations and requirements.

- The AirPods 4 support automatic pairing and automatic switching between Apple devices that are connected to the same Apple ID. This means you can easily switch them between your iPhone and other Apple devices such as a Mac or iPad.
- However, to connect to a PC (especially if it's not an Apple device), you'll need to switch manually. The AirPods 4 can be connected to non-Apple devices via Bluetooth, but switching between an iPhone and a PC usually requires manual intervention, as automatic switching only works between Apple devices.

So to hold a meeting in Microsoft Teams via your PC while connected to your iPhone at the same time, you would need to manually switch the connection if you want to switch between devices.