Why was I denied a 20 week anatomy scan? I’m worried😔

At 22 weeks the doctor told me that my stomach was measuring just fine. And I asked him if he’s going to do the 20 week anatomy scan, because I’ve heard everyone on here saying how important it is. And he said “no its completely unnecessary we won’t be doing any ultrasounds for the rest of the pregnancy” which I’m now almost 29 weeks and I haven’t seen my baby since my first ultrasound at 9 weeks. Everyone’s telling me to change doctors and I’m starting to consider it I’ll be changing soon. But I was wondering if the reason for not having a 20 week anatomy scan was because I have “Medicaid” / “ahccces” i have free insurance and they basically pay for everything. Is that the reason for it?? 🤔