Oh that's what you want. In the clusterfuck with the Turkey involuntary withdrawal from the F35 program half the treaties were renegotiated (you see, can't have any Turk produce weapons unless he's a "genius", that would not be fair. In other news: the Turkish definition of genius is mostly being the son in law of Erdogan [1])
I believe this agreement is part of the restructuring after that cluster... Note that the agreement is both about production and buying. [2]
"Finland has required extensive domestic participation, with industrial cooperation valued at a minimum of 30 percent of the contract price of procuring 64 F-35A fighters. Under the agreement, Finnish firms will produce the F-35’s forward fuselage structures, including components intended for export aircraft. The agreement also includes ..."
As to how the EU is involved: https://defence-industry-space.ec.europa.eu/eu-defence-indus... (ie. that's where you go to ask for loans to start a factory for making F35 components, they have a page listing the deals ... somewhere). Note that this is one of the EU institutions that isn't in the budget (well, the loans aren't). They're not spending tax money to make those loans, they're printing money to make those loans.
So the Finnish government is making this deal, including details on export (and this is obviously weapons exports).
[1] https://en.wikipedia.org/wiki/Sel%C3%A7uk_Bayraktar
[2] https://militarywatchmagazine.com/article/finland-leading-ma...