Focus on yourself - are you learning new skills, are you getting your platinum skills to where they need to be for competition? If so, then it doesn't matter if the others are ahead of you. In fact, they SHOULD be ahead of you, if they have already competed platinum before. So don't worry about them at all. It doesn't matter what they do. Use their experience to guide you. Ask for tips. The older gymnasts almost always want to help, and they have been through this already.
My daughter was a first year platinum this year, and almost the entire team was second year, and most were older. So she didn't worry when they were practicing cast handstands and she was perfecting her kip-cast-clear hip to the right angle. It was exactly where she was supposed to be, and exactly where the coaches expected her to be. She was nervous the first meet, and it was her worst one, because she was afraid she didn't belong. But then she settled in, had a great season, and competes regionals this weekend. And next year, if she happens to repeat platinum (we don't know levels yet) she will welcome the first years with open arms and help them to settle in and believe in themselves.
Always remember, the coaches wouldn't move you up if they didn't think you could do it! So just focus on yourself, try to improve on your skills each week, and don't worry about anyone else. As long as you can do your own routines well, you will have a great season.