Hi. You have done an amazing job, and at 9 plus months, to be honest, she won’t need formula (or ebm- but it’s nice if you have it) when you are at work. she can just take a lunch box and water bottle - seriously! She can have food and water when you are not there.
This!
I went back at 9 months with DS1, he wouldn't drink EBM or formula from a bottle so just had food and water. We breast fed when together and didn't wean until 14 months