Since it says it can support a full (blue) belt, why not simplify the output by outputting as 2 side ?
Curious why the decision comes to this, i'm asking this because no FAQ about it, no thread about it.

Besides, using a vanilla stack inserter, just like the screenshot, the max is only 3 inserter can pull from chest.
No way it can truly output as full blue belt with only 3 stack inserter, unless using some kind of inserter mod (and i don't want to install inserter mod)

Regardless what the reasoning are, (after all you're the mod author, you can do anything you wish).
Is there a way so it can output as 2 side instead ? I mean by editing certain lines.

Thank you.

You can't. If it was possible, I totally would have.
...well, unless you set it to spawn multiple drill entities with slightly offset outputs, but I frankly have no idea how to do that.

And, you can with 2 stack inserter, as long as you have done some of the inserter capacity research. The first screenshot, of a full blue belt output, is running at full speed and there are offscreen things emptying the belt, with vanilla inserters.

Oh i didn't see that 1st picture, mod portal failed to load that pic yesterday, shown as broken blank link.
It loads now.
Anyway, thank you.

I placed a chest out the output, and then used "Loaders" to put the contents of the chest onto a belt. That allowed the ore to be placed on both sides of the belt.

When I noticed the Omega is outputting only on one side of a belt, I just let it output on a blue splitter and merged the lines right away = nicely fully saturated blue belt.

That only works in two of the four output directions. I have no idea why.