Hi Matt! Thanks for the response!
It seems like that method is still changing all of the tab groups, not just the nested ones.
I was able to change certain levels of nested tabs with the ID (i.e. #squelch-taas-tab-group-5), though.
Thanks for pointing me in the right direction!
For example, is there any workaround in the PHP to direct the Read More link to the /event/event-name URL that’s shown while editing the event with the Post Name permalink option selected?