$puppeteer = new Puppeteer();
$browser = $puppeteer->launch();
$page = $browser->newPage();

$page->setRequestInterception(true);
$page->on('request', new JsFunction(
    ['interceptedRequest'],
    "
    var data = {
        'method': 'POST',
        'postData': '".http_build_query($options['form_params'])."'
    };
    interceptedRequest.continue(data);
    "
));

$response = $page->goto($uri);

You can add into docs or smth

when i used this way, the website didn't get the post data

try this:
$page->on('request', new JsFunction(
['interceptedRequest'],
"
var data = {
'method': 'POST',
'postData': '".http_build_query($options['form_params'])."',
'headers': {
'Content-Type': 'application/x-www-form-urlencoded'
},
};
interceptedRequest.continue(data);
"
));