Your numbers are low, so switch to absolute values. If you switch you will be in the green zone.
Red zone doesn’t mean you harm yourself. In my opinion exercise is always great to improve cardiovascular health, regardless what those numbers say.
The idea behind it was that if fatigue (ATL) spikes too quickly, it can overwhelm your body’s ability to recover, leading to burnout or injury. You can read more at TrainingPeaks
Strava doesn’t allow to forward “their” activities, and since the companion app is an external project, it can’t show these from intervals. Import your activities directly from Garmin/Wahoo to intervals, to show them in the companion app.