How would you recommend softening this edge?

Hi All,
Has anyone any ideas on what’s the best approach to softening the this curve, so the edge doesn’t look so jagged without have to go back to the original boolean which now applied.
It’s symmetrical, so ideally what ever I do to one side needs to happen to the other.
Just don’t know how to start?

it’s hard to say as we can’t see the rest of the topology but you can try to select the big face, extrude down a bit, bevel?

@moonboots , in the end it was extrude along normals that helped, thanks for the tip