If your dd is in RG, cartwheel and flips are pretty advance move which will be taught only in the later part. Think of it as it is the Secondary level of the 10 years pri->sec academic curriculum.
If she is really into flips, she should be in AG. as it is taught early and is the fundamental of floor exercise.
The cartwheel/flips in RG and AG are also a bit different, as AG focus on power, movement and speed and RG focus on finesse control and short distance. This is to enable RG gymnast to be able to manipulate their hand held apparatus while executing their cartwheel/flips.
Learning flips requires long term commitment. It cannot be done in 1 month or so, and there is no way you will 'master' flip in short term. You can do the flips, but that does not means you master it (without point deduction in competition).
For tumbling mats, it can be customizes. And it depend on where you are using it. Size matters too if you are using it Indoor. You can try to reach Sun Sport at 9060 9981 and they can advise you better. I have personally purchase tumbling equipment from them, and they are made locally. (Support LOCAL! ) Say GymKraft recommend it. As usual, I am in no way affiliated to them.
Thank u for sharing. Since AG is trained early is it still possible to pick it up when she's 12 or 13? I guess even if it's possible it's going to be tough especially she might not be able to find time to commit long term. But she's really keen.
I will try custom made mat at sun sport if price range isn't too high.