Sample extends with a plugin Simple Sticky Contacts (v0.0.6+)

functions.php

<?php
// Sample extends with a plugin Simple Sticky Contacts (v0.0.6+)

add_action('init', 'codetot_theme_ssc_init', 10);

function codetot_theme_ssc_init() {
	add_filter('ssc_icons', 'codetot_theme_ssc_icons');
	add_filter('ssc_get_fields', 'codetot_theme_ssc_fields');
	add_filter('ssc_svg_icon_map', 'codetot_theme_ssc_icon_map');
}

function codetot_theme_ssc_icons( $items ) {
	$items['map'] = codetot_theme_ssc_icon_map();

	return $items;
}

function codetot_theme_ssc_fields( $fields ) {
	return wp_parse_args($fields, [
		'map_url' => array(
			'label' => __( 'Map URL', 'ssc' ),
			'description' => __('For example: https://google.com/maps/', 'codetot-theme'),
			'svg_icon' => 'map',
			'placeholder' => 'https://maps.app.goo.gl/xxx'
		),
		'map_text' => array(
			'label' => __( 'Map Text', 'ssc' ),
			'description' => __('For example: View on Map', 'codetot-theme')
		)
	]);
}

function codetot_theme_ssc_icon_map() {
	return '<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"/><path d="M3 7l6 -3l6 3l6 -3v13l-6 3l-6 -3l-6 3v-13" /><path d="M9 4v13" /><path d="M15 7v13" /></svg>';
}