Look, Bizaardvark is perfectly safe. Your kid won't see anything inappropriate, and Disney+ makes it easy to let them watch unsupervised. That's where the good news ends.
This is a textbook example of mid-2010s Disney Channel formula: exaggerated acting, laugh-track timing, stock characters, and plots you can predict from the first 30 seconds. The 4.2/10 IMDb rating tells you everything—even the target audience wasn't buying it. The show got cancelled after three seasons, and one of its stars (Olivia Rodrigo, pre-fame) left after season two, which should tell you something.
The premise about kids making online videos could have been interesting, but it's executed with all the depth of a kiddie pool. If your 7-year-old stumbles onto it and enjoys it, fine—it won't hurt them. But there are so many better options on Disney+ that you definitely shouldn't be seeking this one out. It's the TV equivalent of gas station candy: technically edible, but why would you choose it?