Who owns checking that demo and contact-sales paths work end to end?

Question for the RevOps folks here: do you actually own checking that demo/contact-sales paths work end to end, or does that usually sit with marketing/web? Asking because in our latest research, 30 of 53 reproduced sales-route failures showed no HTTP error at all. The page loaded, but the button went nowhere or the booking link was invalid. Curious how teams catch this today.