Is there a way to use Siri with my Bluetooth?

Most wireless headsets use a double tap of the main button for voice commands (like Siri)

You are trying to use it like wired headphones that have the controller by trying with the hold of the main button

If it has a second button also try double pressing or holding it

Airpods do this quite well. If you’re using non-apple earbuds - you can either use the hardware control on the phone to activate Siri, connect a Bluetooth keyboard that allows Siri activation or get one that has a hardware control or sensor that operates like AirPods do with a tap to invoke Siri.

Perhaps another avenue for you to pursue for an answer is to look up yout BT headset on Amazon and check out the Answered Questions, which are located just under Customer Reviews. That's where I learned that the Skull Candy BT headphones I purchased do not "support" Siri.