You may not be able to lower the severity directly on the interface itself. I’d check the FTD/FMC event or alert policy for Interface Status and see whether this specific “no input packets” condition can be filtered or suppressed for selected subinte...

I wouldn’t disable the whole Interface Status module. If those Wi-Fi subinterfaces are intentionally idle, try excluding only those interfaces or lowering their alert severity while keeping critical monitoring for server/Internet-facing interfaces.No...