Thank you for your reply!
One more thing I don't understand is if IP matters on rtmp protocol. As you know Restream/Livepush use their own servers to push your content to a rtmp url, but I wonder if the destination even sees an IP. And even if the answer is yes, it would be kinda illogical for TikTok to look for it as you can make an account with a US sim card and i.e. Turkey IP and it would be an "American" account on the physical device, but when streaming from that same Turkey IP from a desktop, it would (probably?) livestream to turkish tiktok if that makes sense