Yes, Nokia 7 Plus does have the bokeh mode in front camera.
No. Nokia 7 Plus does not have the Optical Image Stabilization but it does have Electronic Image Stabilization.
Nokia 7 Plus front camera is 16MP and it has an aperture of f/2.0.
Yes, Nokia 7 Plus does have the hybrid sim slot. You can use either 2 sim cards or 1 sim card & 1 memory card.
Great battery life, immersive display, solid design, and software at its purest, that's the Nokia 7 Plus for you.