R.J.
You have a GREAT lesson to teach her: initiative.
She needs to work on technique; that means PRACTICE, not lessons. Standing in front of a mirror and drilling, drilling, drilling. It means asking the instructor if she can sit and watch some classes, or help with littles to be a 'working student', AND if the teacher can recommend some good instructional videos (YouTube is an artist's PARADISE. We used to just have VHS recordings of professional dancers we had to pay for, now one can just search youtube and watch professional dancers not just preform but go over minutia).
Watching, absorbing, practicing, trying. Each and every single day. Then when she DOES have her weekly lesson the time is spent correcting minor things (to practice and drill at home), asking detailed questions (from problems she's run into practicing or some detail she's seen someone do and would like to know more about).
I was a gymnast, and I was also a dancer (and a few other things as well, but I'll skip those for the time being). One of the "bad habits" gymnasts fall into is "Needing to be in the gym". Because that is where the equipment and spotters are. There is a very FINITE amount of work you can do at home (all floor and beam, unless you just so happen to have uneven bars, a vault, etc.)
Same problem with Cheer (and other team sports). With cheer you get in the "bad habit" of needing other people, you can only practice so much cheer at home, and then just like gymnastics, your "real" practice is somewhere else.
((Ditto other equipment necessary or people necessary arts and sports; crew, horseback riding, drama, football, whatever... when you need to be elsewhere for your REAL work))
Dance, however, is just the opposite. Like writing, or photography, or painting, or dozens of other individual arts and sports the BULK of your work is done at home. You can dance until your feet bleed, tape them up, keep going. When I was serious about dance, I was dancing 10 hours a day. I started off with just an hour or two, and as my endurance built and my skill level, I got up to 10 hours.
She WILL need full length mirrors. Have her work out that problem (if you don't own them). Hint: Mirror tile is inexpensive compared to real mirrors 9x out of 10. Bars are SUPER cheap, because you don't buy a real bar, you buy a handrailing from HomeDepot and brackets. But if you have a sliding glass door, you don't need mirrors in the daytime. Because if you work outside, your reflection is in the glass. There are TONS of 'work arounds' it's just finding them.
From team & equipment sports, to "self starter"/initiative/practice sports it takes a BIG mental shifting of gears. Ideally, coax her toward the "answers" herself (like, what's the holdup to practicing at home? Mirror & barre. Okay, how can we do that/ how much does it cost/ how can we figure out a way to make it work?) so that she's "thrilled" with the affordable option instead of sad that it's not 'good enough' / perfect. Give her a project (love HS'ing) to find some "heros" in dance (aka she'll start finding those videos on youtube, and the library, etc.), find out what their daily lives are like (practice hours, etc.)
It's a major mental shift. But yah, TOTALLY doable.