There are numerous examples of multi-kilometre tall mountains such as Maat mons on Venus, Mauna Kea on Earth, the Tharsis volcanoes on Mars. We don't find similar such examples of volcanic edifices anywhere else. Why?
Mons Rümker is the the closest thing to that on the moon, but it is a rarity, and quite modest in height anyway.
I am aware that Io has a lot of relief, but these are not really volcanic edifices, but some sort of crustal deformation.
is it heat budget? Io has a lot more than any terrestrial planet. Surface gravity? Mercury's matches that of Mars.
Edit: I've removed cryovolcanic worlds from the title since I understand that cryolavas may have a harder time to build such structures, although I recall Sotra patera as an example of a modest cone found on Titan.