First, there is no central authority within #Nostr that could shadow ban or ban you. However, in theory, relay operators could ban you from their relay or clients could filter your npub. For the first case, be on as many relays as possible (not the spammy ones). That way, if one relay bans you, your posts still appear on the other relays. That's the good thing with Nostr.
Discussion
I think I have enough relays, it's just that too many of the relays and apps have me shadowbanned
What makes you think you are shadowbanned?
It's not a "think" thing, it's been clearly confirmed that I am shadowbanned
I'm just shocked more people still aren't noticing it too