I have Fenix 7X Pro on latest firmware version (19.34) and the Android version of Garmin Connect, also on latest version (5.7). I have set up a Garmin Run Coach plan (not with one of the 3 coaches, just the one that's purely based on Garmin's algorithms that you can select on a 10K plan) and this gives me daily suggestions based on the goal.
I have found out that there are inconsistencies between what's suggested in the app and on the watch, specifically when something changes on the plan during the week. For example if I skip a workout, the app won't change anything for the week, while the watch adjusts the calendar immediately. Same thing happens if I change settings of the Garmin Run Coach plan (change of days or switch of target type from pace to HR), the app stays on the old values, while the watch immediately adjusts.
I attach some screenshots to show this problem visually.
https://ibb.co/3TcrLK2
https://ibb.co/Pmw3tKM
https://ibb.co/HXRCswV
https://ibb.co/pKQVrk2
https://ibb.co/G21tM5v
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https://ibb.co/db4Jh3c
https://ibb.co/cQ3whc9
https://ibb.co/0jrtF75
I hope this can reach some Garmin devs so they can look into it.