When completing a Garmin Coach workout (5k plan) it used to ask for a perceived effort evaluation (how the activity felt) on scale of 5 like the below:

https://the5krunner.com/2018/07/11/garmin-coach-any-good-free-adaptive-5k-running-plan/
This rating is no longer popping up after the activity, only the general workout perceived effort evaluation rating (1-10 scale) is available after completing the workout:
The Garmin Coach specific rating can be only set in Garmin Connect in the activity view (and then it overrides the 1-10 scale):
Before setting, the activity view is like this:

AFter setting the garmin coach spcific (that is oddly only available on the activity details view in GC and not on the main view...:

the main view is changed:

(reported in 14.08 as well: https://forums.garmin.com/beta-program/forerunner-255-series/public-beta-bug-reports/i/bug-reports---14-08/no-garmin-coach-specific-self-evaluation-is-shown-after-workout)