Multisite setup using Valet+

LocalValetDriver.php

<?php
class LocalValetDriver extends Magento2ValetDriver {
  public function frontControllerPath($sitePath, $siteName, $uri)
  {
    if ($_SERVER['HTTP_HOST'] === 'm2.dev') {
      $_SERVER['MAGE_RUN_CODE'] = 'base';
      $_SERVER['MAGE_RUN_TYPE'] = 'website';
    }

    if ($_SERVER['HTTP_HOST'] === 'us.m2.dev') {
      $_SERVER['MAGE_RUN_CODE'] = 'us_website';
      $_SERVER['MAGE_RUN_TYPE'] = 'website';
    }

    if ($_SERVER['HTTP_HOST'] === 'eu.m2.dev') {
      $_SERVER['MAGE_RUN_CODE'] = 'eu_website';
      $_SERVER['MAGE_RUN_TYPE'] = 'website';
    }

    return parent::frontControllerPath($sitePath, $siteName, $uri);
    }
}