Hi ​@Rawarontex ,

I’ve done some searching and it appears that Huawei doesn't support swim activities syncing to Strava - here's a thread with their representative’s answer - outdoor running, outdoor walking and outdoor cycling are supported to sync to the Strava:

https://consumer.huawei.com/en/community/details/topicId-185187/

People at Reddit recommend using the Health Sync app as a workaround:

https://www.reddit.com/r/HuaweiWatchGT/comments/1dcaw8m/huawei_health_app_to_strava/

Hi, i've just realized that just today, my huawei watch (GT 4 series), actualy have an update in huawei health app, and it actually can sync swimming session. Surprisingly, it actually backfill all my previous unsynced swimming records too! Go check it out guys. ​@Jana_S ​@Rawarontex 

That's great news - thanks for the update ​@Yoelwp008, this may help other users with huawei!