Not as a tight block, but yes if they are set on racks with an air gap between them. Where packs press against each other, cold air does not reach the contact faces; the outer pack can look frozen while the middle one is still liquid. And a pack only gains its cooling capacity once it is frozen solid.
That is why GEBHARDT freezes its eutectic plates in freezing racks: the rack keeps an air gap between plates so cold air circulates freely. The freezer runs at least 5 °C below the plate's melting point; freezing takes 15-21 hours depending on the temperature, and a -21 °C plate freezes through in 19 hours at -26 °C.
Rack capacity is set once, and on busy days no extra packs are squeezed in, because every gap that closes lengthens the time of the slowest pack. Readiness is checked on the pack in the middle of the fullest rack, not the one by the door.
