This code snippet disables the ability to pan and zoom the map in the extension User Locations.

um_user_locations_map_args_customize_02.php

<?php

/**
 * Disable the ability to pan and zoom the map.
 */
add_action( 'wp_footer', function () {
  ?><script type="text/javascript">

    function um_user_locations_customize_02 ( args, hash, directory ) {
      args.zoom = 4;
      args.zoomControl = false;
      args.gestureHandling = "none";
      return args;
    }

    // customize the map in the member directory.
    wp.hooks.addFilter( 'um_user_locations_map_args_init', 'um_user_locations', um_user_locations_customize_02 );

    // customize the map in profiles.
    wp.hooks.addFilter( 'um_user_locations_map_field_args_init', 'um_user_locations', um_user_locations_customize_02 );
  </script><?php
}, 20 );

This gist is a part of the article User Locations - Hooks.
Related article - Disabling Pan and Zoom.

You can add this code to the functions.php file in the active theme directory. Skip the opening <?php tag.