Aah my bad. All of the AMP pages styling comes directly from that plugins style sheets, there is no CSS being loaded for things like the Block Gallery, and nor should their be as they are an AMP page.
I have edited the code above to remove the Bullet point from the amp UL. Can you try adding that the Customizer Additional CSS.
I am not sure what the Amp carousel intentions are. But i searched that Post title on my mobile phone and the images are presented in a carousel in the google search