Low iron in 2 year old.

My son just turned 2 on the 19th & has been struggling with his iron since 1.5. They prescribed him some generic brand iron drops and he would throw up EVERY SINGLE TIME. So we decided not to put him thru that and just up his iron intake with food. At his 2 year check up on Monday his bloodwork showed he is still low. His doctor prescribed him a supposedly better tasting one but still had the same outcome. He threw up and almost chocked. I’m really just at a loss. I don’t notice his low iron effect him in anyway. He’s SUPER active & very smart. If anything he might bruise a little more than some kids but he is in that independent stage so he’s always getting into something. I just need advice. I’ve tried smashing up the flint stone vitamins and he won’t take it. I haven’t tried gummies bc he chipmunks his food sometimes. So we have to closely watch him eat. Also to add he has a geographical tongue so I’m not sure if that makes the medicine taste stronger.

Any advice or personal experience would be appreciated!