https://forums.ea.com/idea/battlefield-6-bug-reports-en/unable-to-use-reloaded-drone-gadget-after-being-killed-while-using-drone/12776374
Unable to use reloaded drone gadget after being killed while using drone | EA Forums - 12776374
If you are flying a drone and your player is killed, then if you are revived, you can recharge your drone gadget from a supply but can not deploy it. - 12776374