Today I barely managed to book a 3D ultrasound on the advice of a girl…

Today I barely managed to book a 3D ultrasound on the advice of a girl here in the chat. At the last scan the baby was in a transverse position. I'm worried it won't turn into place. So Onclinic refused me a 3D ultrasound at 30 weeks, saying nothing would be visible. I signed up at Darmed. They said you can do 3D between 22 and 35 weeks. Now I'm wondering if that's a myth or true? Has anyone done a 3D or 4D ultrasound at 30 weeks?