If you search, you’ll learn several privacy-abusing ways to do that via enshitified exclusive walled gardens which share the site you’re asking about with US tech giants.

• ❌https://downdetector.com/ ← avoid (Cloudflare)
• ❌https://downforeveryoneorjustme.com/ ← avoid (Cloudflare)
• ✓https://www.isitdownrightnow.com/ ← good (CF-free & inclusive of everyone)
• ✓https://downinspector.com/ ← good (CF-free & inclusive of everyone)

I only listed 2 bad ones (the 1st two) but when you search the first dozen results are shit. What could be more shitty than being directed to CAPTCHAs and other exclusive bullshit in the course of trying to troubleshoot a problem?

There’s also an onion one but I lost track of it.