Tiny & Small gas giant do exist in FQM (Fyrons Quadrent Mod) which is used in the Adamant Mod (by Fyron
). Many mods use the FQM since it includes Lots more Asteroids (proper 'belts'), Irradiated & Machine worlds and most importantly extra moons (some with atmospheres)
. The smaller Gas giants are reasonably rare but do exist, though I do have to agree they might be a bit to common considering.