Maybe not. Maybe because its legality would have been questionable.
I wonder, with IJS, if one of the concerns about safety would be mitigated -- moves like this wouldn't be listed elements and wouldn't earn scores except as transitions and what they add to the choreography. And to the extent that they don't focus on actual skating skills they would take time and potentially points away from Skating Skills.
So if skaters who can do these moves reliably did include them in a program, it might be clear from the scores that there's no big reward for doing it and if those skaters are winning it's for other reasons. Therefore there would be less incentive for skaters to try to learn it and put it in competition as soon as possible in the belief it would give them a competitive advantage.
Just as lifts in synchro are only allowed at senior level, maybe some of these acrobatic singles or pairs tricks could be allowed only at senior level.
More likely, if the ISU ever establishes a competition circuit for artistic skating focused on audience appeal, such moves could be allowed there. At the highest skill level only if the discipline also includes lower levels.