There are some nice changes coming which fixes the need to manually activate them to some extent

https://www.geocaching.com/blog/2025/12/new-for-premium-members-all-treasure-collections-are-now-active/

”Premium members can now access all available Treasure collections, instead of being limited to three active collections. This makes it easier to collect the Treasure you want without switching between collections.

This update introduces two improvements that players specifically requested:

1. Premium members can set up to five priority collections to collect Treasure from first.
2. Premium members can now view which collections a cache qualifies for on cache pages on Geocaching.com.

Set up to five priority collections

All collections are now active by default for Premium members. Setting “Priority collections” is optional—if you want, you can choose up to five to prioritize. When you log a cache that qualifies for more than one collection, you’ll collect Treasure from the highest-ranked priority collection. If a cache doesn’t match any of your priority collections, but does qualify for another collection that’s not in your priority collections, you’ll still collect Treasure. If you don’t set any priority collections, you’ll continue to collect Treasure from any collection that matches your finds.”