In an ideal world, because they are now the public square effectively, they should be held to a different stricter standard. As well as other big tech companies (App Store, etc.)
Marjorie Taylor Greene has VASTLY more ability to get her messages out, and to therefore express herself, than the average American citizen. She can go on Fox News or MSNBC or she can have her office send out press releases. Please stop saying this is censorship. This is NO WAY meets any accepted definition of censorship in the frame you are using.
In an ideal world, big tech would have more regulation and would have, due to their size, certain regulations on their behavior and who they choose not to do business with, not just in the political sphere.
An example (to draw an extreme example to make my point), Visa and MasterCard (due to their size) couldn’t just say screw OnlyFans. They are too large and influential especially together.