Cakes I had anterior placenta too. If you went back to this thread when I was in the early 20-30 weeks of my pg, it is full of me fretting about not feeling movement. I think I got movements at about, say, 24 weeks? Maybe even later. And I wasn't getting them every day until even later than that. It was either 26 or 28 weeks (whenever it is that the NHS say you should be getting regular mvmt. I had a mvmt chart to fill in in my notes and it was literally the week that that started that I was getting them everyday).
The other thing I found was that the NHS say you should get 10 mvmts a day. With DS1 I had loads more than that (not anterior placenta). With DS2 I frequently struggled to get 10 mvmts between 9am and 6pm like they wanted (even though I was generally counting from when I woke up to sort of 8pm). I had to go in for monitoring several times as I was feeling so little movement, if ds2 had a slightly quiet day I could hardly feel anything.
I frequently had to do the lying down and drinking lucozade or ice cold drinks, or eating chocolate trick to try and entice movement.
Hopefully though you'll get more mvmt than that when it starts. I know plenty of other people said that with an AP the mvmt was later starting but then 'normal' in frequency iyswim. I think Dream said that in relation to being pg with her DD? Although of course you have to learn what's 'normal' for this pregnancy.