🤷🏻‍♀️unless their is a cause for concern, I don’t get any other ultrasound past 20w anatomy scan.
Doc just measures and feels babies position by hand.

I found out at my anatomy scan at 18 weeks but 3 weeks later and she was still feet down. I'll have a C-section so it doesn't matter if she never turns, but she loves dancing on mommy's bladder. Lol. Also at my last ultrasound (2 weeks ago) that she was 1lb 3oz.

It depends on the doctor I assume but my doctors didn’t do ultrasounds after 20 weeks unless there was a concern.

I found out at 20 weeks during gender that my kids were always head down and in position as far as weight didn’t find out until 27 weeks because they’re so small it takes awhile for them to put on weight than again at 36 weeks . You usually would only have 1 sono after 20 weeks unless your high risk that’s how I found out at 27 what the weight was followed by my last one at 36 weeks

Some drs like to do one around 36 weeks but they’re usually not necessary unless your stomach measures way different from what you should be. I believe they can also tell the position of the baby by feeling your stomach.