Hilton plans to standardize CONFIRMED late check out fees at all their properties... You can buy the late check-out as an add-on during the booking process or using the app up to 72 hours before the stay.
<snip>
The late check-out benefit has been removed from the benefits posters that Hilton provides hotels with, and it was already removed from Hilton’s elite benefits matrix a while back... It is still, however, noted on the Hilton Honors T&Cs, and also on the app if you look at tier benefits at each level