This is why bitcoin is borderless.
You can send payment from us to Japan, el Salvador or China or to your neighbors and it makes no difference

Also, there isn't a physical location where bitcoins are stored. I don't exactly have it in my phone or in my hardware wallet. It is everywhere  , in every full node. What I have in my equipment is the private key that let me spend it. You could keep that in multiple locations.

So, there is really no way to move your bitcoin to El Salvador