This is key. Trump’s executive order can’t override the law. Executive orders can only interpret the law. With the courts saying the law is valid, TikTok and US hosting companies are understandably hesitant to resume operations just on Trump’s word (which is worthless anyway) that the ban won’t be enforced.
Continue treating him with respect. I’m kinda assuming you’re in government, but I guess that’s not clear from the post. If you are, maybe let him know that the executive order will not impact how you treat him, and offer him space to ask questions or raise concerns.