There are forums here for both dance, and for musical theater.
One of my kids is a dancer. She did not do competitions during her middle and high school years, but instead focused on training. If your daughter is serious, that is one thing to think about. Would she consider doing ballet training at a really good school? Dance can be entertainment, or it can be art, and sometimes both, just as with music. As she heads into high school, think about these things. Get Dance Magazine, an excellent resource. Consider summer programs.
A student can major in dance at a conservatory, or at a college. Again, Dance Magazine publishes a great guide to dance programs at the conservatory and college level. There will be choices as to whether she pursues a BFA or BA or even BS (Skidmore as an example). There will be choices as to what type of dance program, ballet-focused, jazz, or modern. There will be choice as to how many liberal arts courses will be involved in the degree. And other options such as double major, major/minor, and double degree. Some schools have dance in a dance and theater major, some have a program specifically for dance. Musical theater is a whole 'nother ball game.
Some dancers just go ahead and dance after high school or even during high school (my own daughter got her GED). I know of ballet companies that encourage dancers to take one class at college while they are dancing, so that when they are done, they have some college already under their belts.
Eighth grade is way too early to be thinking about college choices let alone career choices. Just let her explore her interests and work hard. The lessons learned from dance apply to a wide range of life challenges. It is up to you to guide her toward the hard work of entertainment dance, competitions, camaraderie and fun, or a longer term training that has fewer short term gratifications, but sometimes better longer term outcome. Music theater candidates generally do dance, singing and acting- it is a lot!
If she does end up wanting to do dance, as a major, she can do it in a liberal arts college environment, or at a conservatory. Either way, whether BFA or BA, it is a bachelor’s and gives the same access to jobs, grad schools, med or law school, as any other bachelor’s. I personally know a dancer in med school right now, and know of another one who just finished law school. I would not worry about career at this point.
Life zigs and zags and it is good to let it do that naturally as much as possible, even more so with young people
And check out those forums…look for the list of college majors when you go to “forum home.”