> a platform for sharing artwork with as much freedoms on NSFW artwork and uncensored artwork as possible provided they are legal
You are looking for Pixelfed - it's software you can self-host. As long as you obey your hosting provider's terms of service/acceptable use policies, you're free to do what you want:
The link above has a video that explains how you do it. Essentially, go to https://parler.com/ and at the bottom is an icon to download the .APK file, which you open to install the app.
You can also download the file with this link from Parler: https://company.parler.com/android/parler-release.apk