@revrugg I'm 5'5 and about 250lbs currently at 25 weeks. I think body composition, uterus / baby placement, and baby activity level all has a part to play on how noticeable everything is on the outside.
I was able to get husband to feel my baby at week 20ish.
I've noticed a pattern, my baby moves a lot every time after I eat something, he also moves a lot before bedtime and at 1am and 3am. If you can notice a pattern of when your baby moves most that'll help you time it.
I also noticed that it's easier for my husband to feel it when I'm laying down. So now, anytime I'm with him, after I eat I lay down or recline on the couch so he can feel the baby lol
Also you may notice a particular location where you feel baby moving most. For me, it's beneath my belly button.
I recommend trying to identify patterns of when you feel your baby move the most, identify where you think baby is particularly placed inside you, and then that'll help you get baby felt moving.