You can talk without having weekly scheduled 1:1s. If there's a topic that needs to be addressed and you are the one thinking about it first, then you gather the necessary people, you write the necessary text for them to know the context before the meeting happens, and you scheduled a meeting inviting the people you think should know about the topic. Having scheduled 1:1s is orthogonal. I like to treat my managers using the hollywood principle: "don't call me, I'll call you"