Requires a skydome mesh with a material that has Is Sky enabled?

When working with Sky atmosphere on mobile and going through the docs i do not know how i should implement :

Requires a skydome mesh with a material that has Is Sky enabled.

Is there any tutorial or guide that you guys can point me to?

Specifically i am following this tutorial and would like to implement it on mobile:

Thank you.

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Not sure if you solved this but you need to add a static mesh actor (a basic box will do) with Static mesh: SM_SkySphere and Material : M_SimpleSkyDome