hi,
i dont know why but bride add on isnt working. I made some mirroring and loop cuts to order to continue.
Does Blender have a bride Addon 🤣?
In order for Bridge Edge Loops to work, you need to make sure, that you have only one Object. You can be in Edit Mode on two Objects at the same time, but you won't be able to connect (in this case: Bridge) them in any way.
This is the most common mistake made, when Bridge Edge Loops doesn't seem to work.