Tx arnaud gen for cross-posting this here so everyone can see the solution (we already sent an email response).
We have implemented a fix for this, basically allowing you to remove pace from a sport by choosing “None” from the pace units drop down:
This will disable pace display on the activity summary page and a few other places for the sport.
This will be deployed on Thursday.
You can configure the calendar to add kJ to gravel and remove pace. Click Options → Edit Layout and then click the cog icon on one of your gravel rides:
Untick “Pace” and tick “Work”.