Bitcoin Core does permit inbound connections by default, however it doesn’t promote its personal handle through the preliminary synchronization. So should you simply began working Bitcoin Core and haven’t caught as much as the chaintip but, that will clarify why you aren’t seeing any inbound connections but.

One other widespread purpose is that your community configuration blocks entry to Bitcoin Core’s port from the web, and it’s possible you’ll have to open the port in your router in your node.

Lastly, you might have explicitly configured your node to forestall inbound connections by way of --nolisten should you adopted some information that was aiming to cut back your bandwidth utilization.