At this moment Review mode will show the given answer(s) and what were the correct answers.
There is no longer a built in way to give textual feedback, if that is what you want. Feedback is easy during the quiz.
If you want text feedback during review, you can add a hidden text container to each quiz slide. Use the system variable cpInReviewMode to show the text when in Review with a shared or advanced action On Enter for each slide:
IF cpInReviewMode is equal to 1
Show Text_x
ELSE
Hide Text_x
I would prefer a shared action, with the Text name as unique parameter. This tweak was mentioned in one of my blog posts:
https://elearning.adobe.com/2019/05/quiz-tweaks-6-review-mode/
Yesterday I posted a sample project, using this approach, in the elearning community. You will see some screenshots in the introduction text as well:
https://elearning.adobe.com/2020/11/custom-feedback-during-review-quiz/
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