I was using the remainder of my beloved and discontinued Josie Maran mineral SPF during pregnancy. I am still looking for a worthy replacement, but I've linked a pregnancy safe mineral SPF here.
SPF is always last. Do not layer oil, moisturizer, or gua sha on top of this because it can interfere with the sunscreen film. If you can only do one thing in the morning, it is sunscreen. This is the non-negotiable step for dark spots, sun damage, and keeping the rest of the routine worth doing.