Will iGPU support dual 4k monitors

I am donating my 2k monitors to my son, and I would like to uprade to dual 4k monitors.
This will require a new PC build. I would prefer a small build (mini-itx if possible) and to not need a discrete GPU card if an iGPU would install and run well enough.

Any successful iGPU/MB experiences would great to learn about.