It's a big difference that should be highlighted. Taiwan actually purchases the stuff....but the US has been really reluctant to arm them to the teeth....don't want to antogize China. That policy has been blown up by the Ukraine war.Taiwan buying equipment from the manufacturers (with US govt approval) is not the same as the US emptying its already on-hand equipment. Something ordered in 2015 should in no way be affected by whatever the US has given Ukraine.
Arm Taiwan to the teeth....