First of all, you can secretly observe what kind of live broadcast she is. If she only shares the live broadcast of some ordinary things in her life, it will not affect her personal image, so there is no need to oppose such live broadcast. For example, she may broadcast some singing or dancing live, which is normal. Then you can look at some of her clothes during the live broadcast. If she wears less clothes, you can remind her that it is indecent or something. You need to know what kind of live broadcast she is first. Then formulate corresponding measures accordingly.
Communicate with her more at ordinary times, let her have trust in her parents, and develop the habit of sharing everything with her parents. Then you should let her know that the internet is different from reality, and don't trust people and things on the internet too much. Prevent her from being cheated and hurt by the internet. Then you can take some time to learn about the live broadcast platform. For example, if you have time, you can watch her live broadcast, observe your daughter's career and see if there are any inappropriate people.