At 10 months needing a puffer every month is definitely something worth flagging properly with your PD, because at that age it can point to a few different things and it's good to get to the root cause rather than just managing symptoms. Some parents try things like making sure the home isn't too dusty, cutting down on air-con exposure, and ensuring baby gets enough sleep, which can all support the immune system in a general way. That said, I'd be careful about adding supplements without checking first, because not everything marketed for immunity is suitable for babies this young. It might be worth asking your PD specifically whether a referral to a specialist makes sense, just so you have a clearer picture of what's going on.