I don't follow these things, but I seem to recall they like to lock up their older properties for decades at a time. I can't recall Snow White being in theaters recently and I have no idea about Blu-Ray or DVD.
Just wondering because if not, it's today's kids great-grandparents who saw it in theaters, not their parents. It doesn't have the nostalgia factor of a Moana or Lion King.
SNWHT's performance may not be a good indicator for TANGL.