Quick civics lesson, cuz it doesn't sound like you actually know very much about "free speech."
The first Amendment guarantees that the government, in most circumstances, can't stop you from saying what you want, in public.
Freedom of personal property, a defining aspect of the United States -- you know, the thing that makes us not-Commies -- allows people to control their own private property. The App Store is Apple's private property, and if they want to ban white power neo nazi apps -- the group Parler was literally built for and to make money off of -- they can do it to their heart's content.
These "conservatives" and their lack of understanding of so-called "conservative values." Do they want to preserve private property laws or not, I can't tell. Oh that's right, only when it supports their views. Typical for these hypocrites.