no, it’s a content and editorial restriction. it is not merely trade.

No, it's not. There's no opinions on TikTok videos that would be legislatively banned by the US on other platforms.

If you do have examples of those kinds of speech restrictions, by all means, provide examples.

the use of bytedance’s algorithm is an editorial decision that is being banned

And yet the exact same algorithm used by a platform owned by another country would not be banned. Thus, it is not actually content-based.