Elsewhere it specifically calls "emotion recognition" to be of "limited risk" (calling for transparency) and elsewhere kind of implies it to be "high risk" (as being part of the "annex"), though maybe it's just calling out use of emotion recognition in those high risk areas (e.g., credit scores).
But it doesn't seem to actually define "emotion recognition." (Though someone else says it involves biometric data, which seems in line with everything else in the regulation.)
All that said, it seems like under the law you could actually make emotion recognition systems, even for education, it's just that education institutions and workplaces couldn't use them. (Though that's a pretty big blocker for an educational tool!)
[1] https://www.europarl.europa.eu/topics/en/article/20230601STO...