Re: 10.5 month old getting enough BM??
I think he's probably doing just fine. My daughter started taking less and less of her bottles right around the same time and by the time she was a year old she was refusing them at day care altogether, though still nursed quite frequently in the evenings and on weekends- a similar schedule to yours I think. I was a bit concerned for the same reason- my daughter is small and has stayed right around 5%ile her whole life so far, but the pediatrician wasn't concerned since she was remaining consistent. So my point is that he's probably fine.
If you are still concerned, though, you might ask the day care providers to make sure they offer the bottles before feeding him solids, to make sure he isn't full right before bottle time. Also, they could try giving him bottles right before naptime when he is sleepy. Those were the last bottles my daughter gave up.
You're doing a great job, mama! Keep up the good work.
“We are not put on earth for ourselves, but are placed here for each other. If you are there always for others, then in time of need, someone will be there for you.”