Hello Tobi

Table type cannot be changed.

I suppose you're using the API method of creating Google Spreadsheet tables? If that's true, can you please try using this filter in your functions.php of your theme or child theme?

/** 
 * Extend http timeout duration to 25 seconds
 *
 * @param int $timeout The timeout duration in seconds. Default is 5
 *
 * @return int The filtered timeout duration in seconds.
 */
function __extend_http_request_timeout( $timeout ) {
    return 25; // Value in seconds. We believe that 25 will be enough, if not increase it
}
add_filter( 'http_request_timeout', '__extend_http_request_timeout' );

If that doesn't help, try the following suggestions from the link below:

https://www.wpbeginner.com/wp-tutorials/how-to-fix-curl-error-28-connection-timed-out-after-x-milliseconds/

Please let me know if that helped.

How big are those tables, Tobi?

If they pull a lot of data, the loading times will increase, and the page will eventually break.