Is there a way for me to customize multiple waypoint symbols at once on the inReach web app?

I have lots of waypoints for certain areas - campsites, launch sites, trailheads, day use areas, etc. In Basecamp, I like having them all labelled with different symbols. I've been using the inReach web app and Explore mobile app to sync waypoints to my device (more frequently than syncing from Basecamp) because I like being able to hide/show collections of these waypoints on-demand on my device.

The inReach site imports the GPX file and gives all waypoints blue flags, regardless of the symbol I was using in Basecamp. That would be fine if I could quickly change all the symbols on the inReach site, but it seems I can only change them one at a time (which will take forever!).

Am I able to change multiple waypoint symbols at once on the inReach site?

Alternatively, is there a protocol I can use in the code when importing a GPX or KML file to the inReach site that allows me to keep the symbol? inReach seems not to pay attention to the <sym> tag.

Thanks!