EGS itself is a graveyard for indie games, game discovery is complete shit and they have no plans on improving it..
When it introduced Steam Direct, Valve prioritized the development of Steam features that helped users discover games they might be interested in, such as the Discovery Queue. The Epic Games Store will continue to get interface updates, but as a matter of principle, Allison says that Epic will not track user behavior and use it to algorithmically recommend games. Epic has said in the past that it's more interested in supporting the game discovery that already happens outside of stores, such as on Twitch and YouTube.
Steam has great features to advertise indie games such as dedicated events and such so a lot of indie hits have come from it, like Valheim, Fall Guys, Among Us, Terraria, Stardew Valley, Rimworld, Factorio, The Forest, etc.