They can keep the eggs warm enough to hatch in those temps.
How they react when they hatch is always good to observe,
some broodies set well but are lousy at taking care of the chicks.
I have no idea if your bird can keep 11 chicks warm or not,
if they all fit, and she's a good mama could work out great.
Did you put all fresh fertilized eggs under both broodies at the same time?
Did you keep any other birds from laying in the broodies nests?
If not, you may have a staggered hatch....that's another thing you may have to manage.
Were your incubator eggs started the same time the broodies started setting?
Giving chicks to a broody hen can be tricky.
Best of broody has been broody for a good couple weeks,
or broody might not accept them.
Chicks should be just hatched or no more than a day old,
or they might not want to stay under the broody.