Weaning off formula?

Celeste

My son is ten months. How important is it for him to be weaned off of formula at a year old? We’re working on transitioning from bottles to sippy cups. He does really well with Purées and especially finger food, but he still loves his milk. Can I use toddler formula after a year if he still wants a bottle or so a day? When did you partially and completely wean your babies off formula? Thanks :)

Edit: I forgot to add that I know asking his pediatrician would be best, but we’re stuck with a pretty awful army doctor and can’t switch 🤦🏼‍♀️ so I’m looking for first hand experiences first :)