The US constitution is for the people in the US. Chinese companies don't apply. If you want to grant freedom of speech protection under the US constitution for TikTok, then TikTok must be owned by US people.
You still have freedom to read. You will still be able to access TikTok if they choose not to sell. This is not a firewall block on TikTok, it is a business restriction on operating within the US. It simply bars US companies from hosting TikTok services or distributing the TikTok app.
