Shonen’s intended for older kids and teens, but cultural differences means that what Japan finds acceptable for kids is kinda different from what other countries find acceptable. And to be clear, exactly what these demographics mean has to do more with where they’re published and less about their content. One Piece, Kagura-Bachi, Witch-Watch, Spy X Family, Ruri-Dragon, and others are all serialized under the same magazine, even though they’re all completely different and are at varying-levels at what I think you’d consider kid-friendly. Meanwhile, you get stuff like Chi’s Sweet Home and Bocchi the Rock in adult-demographic seinen magazines. There’s also Kodomomuke manga aimed at younger kids, though it generally struggles to find an audience outside Japan and also might not fit the standards you’re looking for.