Lesson explanation of present or past

Did part of this lesson accidentally get deleted? It seems very incomplete compared to other lessons. It says "Let's find out which tense and mood you can use after "depuis que"." Then it gives 3 examples but doesn't actually explicitly explain which tenses and moods to use, other than one note about indicatif, even though each example has a different combination of present and/or passé composé.

Hunting through the comments, it appears there was a change mentioned 11 months ago, but Joseph's answer was not actually included and I wonder if the general grammar rule may have been deleted when the exception about Indicatif was added?

Celine's answer to John 3 years ago has some explanation of present tense vs. passé composé, but there is nothing like this in the actual lesson itself.

I stopped reading halfway through the many comments as it appears many other users have also previously felt the lesson did not have an adequate explanation...