@davidspetri First-time mothers don't tend to feel movement until at least 18 weeks but it's not unheard of for there to be no feelings of movement until 22-24 weeks, depending on the placement of the placenta the overall activity level of your baby.
If the placenta is anterior, that means it sits on the side of the uterus that lines up with the exterior of your wife's abdomen. It doesn't really mean anything health-wise but it does make it take longer for fetal movement to be felt, since there's a thicker layer of tissue between the baby and the outside world.
If the placenta is posterior, that means it's in the back of the uterus and there's less tissue between the baby and the outside world. You're more likely to feel movement earlier.
You can find out if your wife has an anterior or posterior placenta by asking the ultrasound tech or going back over any medical records that might be in your wife's patient portal from any previous ultrasounds this pregnancy. Most ultrasound records will state whether the placenta is anterior or posterior. Knowing this will help calibrate your expectations around fetal movement .
I had a posterior placenta with my first and starting around 18 weeks, she was going absolutely nuts in there. My friend who was pregnant at the same time as me had an anterior placenta and didn't feel anything until 22 weeks, even though it was her second and most second time moms feel movement earlier. This pregnancy I have an anterior placenta and don't expect to feel movement until around week 20.
TL;DR- totally normal to not feel movement yet. I wouldn't worry.