There's services specialized in crawling + VPN. Often used to crawl shopping websites or Google result pages. One example is https://www.scrapingbee.com and you select the country https://www.scrapingbee.com/documentation/country_codes/ They can do screenshots, too.

If the concern is uptime there's a couple of service that also do regular screenshots and alerts when the website is slow or unresponsive. https://www.debugbear.com/ for example.

For a super quick check (every couple of months I need this) I usually use https://www.webpagetest.org/ Under 'advanced configuration' there's a dropdown of locations around the world. I gives a screenshot but not access to the full HTML.