PAra guardar campo date en drupal hay que usar este comando
$dateTime = DateTime::createFromFormat(Y-m-d,date(Y-m-d));
$newDateString = $dateTime->format(Y-m-dTH:i:s);
$node = Node::create([
type=>pagoefectivo,
title => Transaccion .date(y-m-d H:i:s),
field_pe_token => $Token,
field_pe_cip => $numCip,
field_pe_numero_orden => $numOrden,
field_pe_order_id => $this->order->id(),
field_pe_fecha_generar_cip => $newDateString,
field_pe_uuid => $user->get(uuid)->value,
field_pe_monto => $order_item[0]->quantity,
]);
$node->save();