How to: One project that unlocks Achievements on Steam and/or Epic Games Store

Hello,

Unreal Engine 5.6

I did try using Epic Online Services Plus by following this video. But I do not see the same options that he has as Cross platform.

Another plan I have is to: implement Epic Online Services as the default online subsystem and use native C++ Steamworks API to unlock achievements. Not sure if that is the way to go.

I am wondering if someone knows how to make it work with Epic Online Services Plus.
And have a solution where I do not need to make two builds, one per storefront.

Thank you.