Re: It is indeed practically everywhere
When I first set up my Pi-Hole, my daughter came to visit and logged into my Wi-Fi. A few minutes later, she said "your Internet doesn't work!"
I quickly checked with my phone, nope, everything working fine.
She then said, "but Instagram isn't working." Ah, that would be because all of Facebook is blocked (over 2,000 domains and counting). "But this is Instagram, not Facebook!" Quick lecture of who owns Instagram and WhatsApp and she logged back out of the Wi-Fi to check her Instagram account.