300-500 is the seed audience, tiktok shows every new video to ~200-500 people first and only escalates it if the completion + engagement on that batch beats a threshold. stuck at that number on EVERY video means your content keeps failing the seed test, so its a content problem not a shadowban, and dont bother contacting support, that does literally nothing here. the one lever is completion rate: shorter videos are mathematically easier to finish, so cut the length hard, hook in the first second, make it loop. try posting a 5-7 second ultra tight one and see if it breaks 500. how long are your videos and whats the avg watch time on them?