You could have just read my post to get the answer to this question.
I put the details right in there.
But here is the reason from my original comment: "This is the case even though they are a private company.".
It is because shopping malls are a private company.
Therefore, there are cases where it can be legal for the government to force private companies to allow certain speech.
Also, please directly acknowledge that I mentioned California in my original comment and that you just ignored that part for some reason in an incorrect attempt at a disagreement.
I expect you are just going to jump to another unrelated question or disagreement and not acknowledge that now both of your questions could have been answered by just reading my comment, instead of intentionally misunderstanding it.
Finally, you didn't directly say whether you agreed or disagreed with my central point which was this:
"There are absolutely all sorts of ways that private companies can be forced by the government to allow certain speech.".
I will assume this means that you have no disagreement with me in any way on this point because you just ignored it.