Amp mobile formatting not working

Hello @richards1052

Thank you for contacting us, it seems you are using the AMP plugin with Reader Mode with the legacy theme. When we checked your site the text seems to be displaying normally on mobile devices on AMP pages.

You can add a custom CSS to increase the font size using the amp_post_template_css hook.

example: add the following code in your child theme functions.php or in a custom plugin.

add_action( 'amp_post_template_css', function ( $amp_template ) {
	// You CSS goes here only CSS no need of <style> tag.
	?>
	.amp-wp-byline amp-img {
		border-radius: 0; /* we don't want round avatars! */
	}
	.my-custom-class {
		color: blue;
	}
	<?php
} );

Learn more about customizing Legacy themes using our documentation