editor.js

wp.domReady( () => {
	wp.blocks.unregisterBlockStyle( 'core/button', 'default' );
	wp.blocks.unregisterBlockStyle( 'core/button', 'outline' );
	wp.blocks.unregisterBlockStyle( 'core/button', 'squared' );

	wp.blocks.registerBlockStyle( 'core/button', {
		name: 'tp-default',
		label: 'Default',
	});

	wp.blocks.registerBlockStyle( 'core/button', {
		name: 'full-width',
		label: 'Full Width',
	} );

} );