Do they still have only 2 sealed (marked) transmissions /car for connected/paired rallies ? (must use same ones in Portugal and Sardinia ?)

Those can't be fixed, if it's broken it's broken ?
or can they open those seals between rallies ?
(I know that during rally it's forbidden to brake those seals and fix parts,)

What I mean:
Is Hyundai (Neuville and possibly Tänak) in trouble because they don't have any spare ones left ?