Collect and trade Medals in the new Pokémon HOME Update! In the latest update to the mobile version of the service, you can now obtain digital souvenirs.
Collect Medals in the New Pokémon HOME Version 3.3.0 Update
The latest Pokémon HOME update lets players obtain digital souvenirs that can be traded or sent as gifts. The mobile device version of Pokémon HOME has been updated to version 3.3.0. You can now collect medals, digital souvenirs that can be claimed by visiting real-life places with a connection to Pokémon or by participating in Pokémon events. These medals can be traded with other players or sent to them as gifts.
Players that use the Pokémon HOME Basic Plan can possess up to 30 medals. Those who have enrolled in the Premium Plan (Paid) can have up to 1,000 medals.
Please note that this feature is only available on the mobile device version of Pokémon HOME. It must be linked to a Nintendo Account in order to have medals.
Source:
https://www.pokemon.com/us/pokemon-news/collect-medals-in-the-new-pokemon-home-version-3-3-0-update