I'd say we did a fair amount the first time around.
Caspar Weinberger ****** He provided the United Kingdom with all the equipment she required during the war. Ranging from submarine detectors to the latest missiles. All this was done very discreetly.***********
Britain and America: America’s role during the Falklands
Same thing is mentioned in the wiki for it.
I'm pretty sure I remember hearing we were doing some "coincidental" aerial recon for them too.