Why
exactly do you want her to be friendly?
She seems to be managing just fine without you.

You could 'tame' her. Would that be for your benefit or for hers?
Provide her with food and water and if she will use a coop space provide her with that as well.
She may not mix with other chickens is you have them.
It is perfectly natural for a mother hen to be on her own with her chicks. A lot will depend on who she lived with before she sat and hatched, if she has a rooster and where she considers home to be.
Here mums that sit and hatch away from their coops all at some point return home with their chicks and introduce them to the flock they lived with. There is no particular time this is done. It depends on the hen, what her position was in the hierarchy, the safety of her nest site and to some extent the fearfulness of her chicks.
I would leave her be. While the chicks are very young, mother permittinng, you can get them to accept you to the point of handling. From approximately 10 days old, that chance is gone and their natural instinct is to be fearful of humans. Once the mother has stopped feeding and caring for them, that would be the time to try to make friends.