For what the film shows, yes: - She told Kiara to listen to her father in an important matter - She encouraged Kiara's self-esteem in hunting matters - She adviced Kiara's father to not make hasty decisions related to Kiara's well-fare - She was at alert when Kiara was in danger and her father going into rescue (at the end with the cliff and the river)
With Fluffy, we don't know as much. With Kiara, yes. As we know Fluffy is Kiara, Nala is very nurturing and loving mom. She's cares very much about Kiara, when it come to dangers. She tells Simba that she'll be alright while Kiara is exploring adventure. While Simba is worried as heck sending Timon and Pumbaa to look after her.
Well of course, Even though we really didn't see her in TLK 2, We would know she would still be a good mother in TLK 1 So of course nala would take care of her cubs and worry for them like simba would do, If she had a bigger role in TLK 2 I would like to see her have مزید roles like she had in TLK 2 So nala would be a good mother. Nala is a great lioness.