One of the best lessons of gymnastics is what happens when you DON'T achieve your goal....what you do next, how you approach changing that frustration into something positive. At 8 all this is really hard, and at Level 2 its sad to see so much pressure put on a kid to score well...but different gyms do that very differently (we don't compete at all until new Level 4 - level 2 is rec only here - fun, fun, fun)
If she's fairly new to gymnastics it may just take more time than she wants it to. If she's a "slow mover", then the most important thing would be her enjoyment of practices, her team-mates, and setting mini goals that are achievable...ie, not score related (I have no idea what skills she is doing but I'm sure her coaches would help her with the goal setting). My DD thinks of herself as slow to learn skills....and needs more repetitions than some girls to get stuff - this is partially a fear issue with her, and partially something she has figured out about herself. It kept her a level 7 this year, and she's had to work through a lot of frustrations on the way....however, I will say that the only helpful things I have done is support her, encourage her to give it her all and see the things she IS accomplishing, to remember WHY she does gymnastics (friends, fun, etc). Meets are family mini-vacations, and she sets goals with her coach for each one....at 11 and optional level she is hoping for college gym, but at 8 she was hoping for a bag of candy and dinner with friends after the meet....their coach didn't let them see scores until after the meet and I think that year DD went from a whopping 19 (scratched bars) to 33+ scores - then did a few meets of same level the next year before putting on the gas through old L6...
point is, if your DD likes gym and its a "good thing" for her then this will pass....and be a good lesson in life. THERE WILL BE TEARS along the way....not every good gymnast gets to level 10...some are just fantastic kids who enjoy it, are good team members, get great exercise and have fun - maybe hit low level optionals in high school or do excel...and who knows, your DD may struggle a bit for a while than move quickly at higher levels - you really can't be sure...but you can be sure that learning that self esteem isn't about winning or getting what you want will really benefit her...
Of course I really hope she gets whatever magic score her coaches require to move up or train up or whatever makes it more satisfying for her!
I think from what you are saying she has much less to add than the 19-33 season - it can happen, but it doesn't always...