No, there's no such reasoning in that decision, which confirmed that speech itself is protected by the first amendment, regardless of who originates it.
And this ruling had little to do with any of that -- the first amendment challenge was that the ban imposed content-based burdens on the speech of the users of TikTok, and the court ruled that it did not. So the ban therefore survived the challenge under intermediate scrutiny.
The domestic vs. foreign ownership element of the ruling only pertained to the evaluation of whether there was a compelling government interest in enacting the ban, not whether the government was exempt from first amendment scrutiny at all.
And this ruling had little to do with any of that -- the first amendment challenge was that the ban imposed content-based burdens on the speech of the users of TikTok, and the court ruled that it did not. So the ban therefore survived the challenge under intermediate scrutiny.
The domestic vs. foreign ownership element of the ruling only pertained to the evaluation of whether there was a compelling government interest in enacting the ban, not whether the government was exempt from first amendment scrutiny at all.