My 3 year old dog is jealous of my kids

Hi. I’m looking for some advice on what to do in this situation. I have a 3 year old female mittelspitz (with a dash of corgi), she is super kind and loving, but she loves me (mom), and I noticed she can be a bit jealous of my kids. If I cuddle with my daughter in the sofa she will come and snuggle too, but lean against me and make a sound if my daughter tries to pull the dog closer to herself. Cuz my daughter really loves the dog and wants to cuddle, but the dog just wants me… Today my daughter pulled her closer and she gave a «warning bite» (biting the air close to her arm). She also reacts if the kids try to pick her up (I’ve said they are not allowed to, so they have stoped. Just trying to paint the picture). When she was a pup she would refuse to go on walks with anyone else then me, it’s not like that now. She barks if I let her out in the garden, so I don’t let her go out alone. And she used to have a big issue with baring at dogs on her walks, but she is much better now and we really worked hard on this. So now I am noticing that she seams jealous of my kids. I don’t like that, I will soon start a new job, which means my kids will be home alone with her for 2 hours a day every afternoon during the week. What can I do to help this situation. I’ve only hade Labrador before, so I’m not used to these issues ❤️.

My kids are 13 and 10.