I found a question regarding the Wedding option in the spell ceremony - What qualifies a creature as being "widowed" for the purposes of Ceremony? - but saw none about the other options.
The description of the ceremony spell (XGtE, p. 151) says, next to the Coming of Age and Dedication:
For the next 24 hours, [something occurs]. A creature can benefit from this rite only once.
That's a bit ambiguous. Does that mean the creature can only benefit from the rite once within the 24 hours to avoid stacking the benefits, or is that once ever?