Open My Devices in Central and select the relevant device card
The device card should identify the operating system and current protection status.
BITDEFENDER CENTRAL GUIDE
Review protected devices, install protection on another device, remove an unused device and understand what removal does to the installed application.

The device card should identify the operating system and current protection status.
Warnings shown here can help distinguish an account issue from a problem on the device itself.
Check the device name carefully so that an active computer or phone is not removed by mistake.
Uninstall separately on the device if the application is no longer required.
Confirm that the subscription still has an available device slot before sending the installation link.
FAQ
Answers based on the linked official documentation.
No. Uninstallation is a separate action on the device.
Central normally updates the available slots shortly after removal.
Central may offer allocation changes when compatible active subscriptions are available.
OFFICIAL REFERENCES