It depends on your business. To be honest, if it is a black hat, TIKTOK may be more strict because it is a new platform and does not want to leave a bad impression on its customers. You can also try it in case it is against yours. The business will help, and you won't be as miserable as you are now.
As for agency accounts, I have been looking for them recently, and I found that many agents got Facebook business agency accounts from China, but I am in China, and there are three types of business accounts in our country, one is ordinary (350-450 Limit) fixed homepage and domain name, second type, no limit on consumption, fixed homepage and domain name, third type (highest weight) no limit on anything. The first and second types of corporate accounts I got did not have bans as they said (most agencies also use these). On the contrary, they would immediately ban advertisements once they publish them, especially black hat ones. So I am still trying to communicate with agents from other parts of the world, hoping to get a more useful agent account.