When I try if I use individual ico-spheres (individually transformed) as inputs for the the boolean works just fine, however if I use instances on points the output disappears! Trying to resolve this for hours now, but can't seem to understand why it's not working. Could anyone please help?
It works fine here with Realise Instances added in Blender 4.00 beta:
version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-11-07 21:30, hash: 7f89063161cf, type: release build date: 2023-11-08, 02:04:51
The only difference I can see is that your version only has one Mesh input on the Mesh Boolean node and I see an I in the boolean header bar which says "Instances in input geometry are ignored" when you hover over it if I leave the Realise Instances node out!