Sync older activities from Huawei Health

Hello,
I have an athlete who used to sync his activities from Huawei watch to Huawei Health to Strava and then from Strava finally to intervals, but he just changed to sync directly from Huawei Health to intervals. This change erased all of the Strava previously synchronized activities from his calendar.
We don’t know how to get those older activities synchronized again but now directly from Huawei Health.
Does anyone know??

Thanks
Regards from Mexico :slightly_smiling_face: