Unreal Engine is under a different developer license than the one Apple canceled, though the judge did rule it would be legal for Apple to cancel all of Epics licences.

"(2) a declaration that (i) Apple's termination of the DPLA and the related agreements between Epic Games and Apple was valid, lawful, and enforceable, and (ii) Apple has the contractual right to terminate its DPLA with any or all of Epic Games' wholly owned subsidiaries, affiliates, and/or other entities under Epic Games' control at any time and at Apple's sole discretion."