Unfortunately it’s not that easy.
They have already got a large sum of F16’s, but it takes training of Ukrainian pilots before they can be used in combat.
From what I understand they should be ready to fly in early 2024. That still a long time to go - but you don’t want to lose pilots or planes because of inexperience with that type of airplane.
I think it was a Nilfisk. Today I have a Roomba and a Phillips.