Indeed. You are not currently permitted access. The hacker who found the Disneyland page found it at https://disneyland.disney.go.com/entry-reservation/ (It’s now gone) so I’m making an educated assumption.
Yes, I believe it will be either of these two pages.
https://disneyworld.disney.go.com/experience-updates/park-reservations/
OR
https://disneyworld.disney.go.com/experience-updates/entry-reservations/