Good Day Impeckable, I wanted to know if use of epic store items from epic store, Megascans and other content that Epic games have provided for free to use with Unreal Engine only?

EULA can be found on this link: https://www.unrealengine.com/en-US/eula/creators?sessionInvalidated=true

Megascans License for UE4: https://help.quixel.com/hc/en-us/articles/360006130057-Are-the-assets-on-the-Unreal-Unlimited-plan-free-