Yes, you may keep your acrylic nails on, if the color of the acrylic or polish is nude or very light shades. It is not recommended to wear dark polish or you may need to remove it from at least one nail bed. It is always an excellent idea to bring any questions with you to your consultation for further clarification.
Oxygen levels can be monitored with finger or ear lobe probes, but not every facility has both. I would recommend clarifying with your surgeon in advance to see if you need to remove your nail polish. As always, seek proper consultation before treatment and best of luck!