I think social platforms should be allowed to regulate who they allow on their platforms. It is similar to not allowing a naked person to eat at a restaurant. As long as it isn’t a protected group that they are dismissing, it should be allowed.
I do think sex work should be legalized but I don’t think businesses should have to cater to that industry. Currently, you can choose to not let smoking products advertise on your website. I also think it is difficult to argue that social media is essential infrastructure. A person can easily live in our current society without it.