Your dog is still very young. Would you expect one of your children not to wake early at that age? I don’t mean your dog is your child, I mean she’s very young before the “a dog is not your child” brigade come along.
We have labradors and they sleep until we get up at 7. What we have found in the past is sometimes lighter mornings can make a difference to them waking because they hear birds cheeping and the light comes in earlier in spring.
Do you have a night time routine? What time does she normally settle for the night?
Where does she normally sleep and what does she sleep on?
You say you leave her barking until your alarm goes off, if she’s barking she’s going be disturbing your daughters sleep.
Your dog is probably entering the teenage years too.
Personally I never get annoyed or cross at one of ours. From a very young age we taught the command of a hand signal to stop barking as we live rurally and sometimes it’s ok to have them barking.
I don’t like dogs on the beds as ours are mud monsters, they roll in deer, fox and rabbit shit and swim anywhere there’s water. They’re all sturdy labs too so we wouldn’t all fit in our bed 😂