Baby moves and kicks?

Holly • 25, due with our first baby(boy) December 29! I've been married (to the best husband) for a little over 3 years now!😁
When is the latest people felt their baby move (more consistently) I think I've felt him once, but then that was it!..😢 (I'm 20 weeks+1 day!) (first time mom!)
And we just seen him today on an ultrasound! And he's for sure moving around in there! Lol☺️