How can i mirror these holes?

So to make the hole using boolean and then cut it in half and then used mirror modifier
(you really can’t notice but the hole is spherical)
so i would like the hole left and right… etc and also diagonally…

I think you can use the Spin Tool.

I start with 16 vertices after deciding I want 8 holes. I make a circle on the YZ plane.

I cut out a 1/8 slice and use Boolean Operations (difference) with a cylinder and extruded plane.

I go to edit mode and use Spin (SHIFT 5) with 8 steps around the X axis, 360 degrees and auto merging vertices. My shape isn’t right because I forgot to apply boolean before the spin operation.