Why I do not get vacation mode options?
Check this out: Fiverr Help and Education Center (Setting Your Availability).
But don’t show that option my profile page.
Can you provide a screenshot? What does your profile look like?
Oh, you’re on mobile. Hmm…
Okay, I checked and it looks like your gigs are paused? Maybe if they’re all paused you won’t have access to OOO, because it’s not needed? Not sure.