[DeusExMachina]

Gab is not allowed on the App Store.

[threeseed]

Gab and Parler both had issues with lack of content moderation.

You can't expect Apple to allow apps which wilfully tolerate illegal content.

[arvinsim]

Is Apple the arbiter of illegal content(adult content is not allowed in the App store)?

[thephyber]

Is that because Gab has a specific type of political content (IMO unlikely) or because Gab fails to keep illegal content or Apple’s minimum level of moderation (the reason Apple removed Parler)? I would bet money on the latter based on the coverage I have seen of Gab’s content.