On Samsung devices, a default app can be set for different types and changed over and over again. By default, pre-installed apps such as the Google Chrome Browser or the news app are set as default. If alternative apps are installed, they can also be set as default. These include

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Apps
Step 3:  Open the  menu
Step 4:  Tap on  Default apps
Step 5:  Tap on desired  Category
Step 6:  Tap on desired default  app
  1. Open the Settings
  2. Tap on Apps
  3. Open the menu
  4. Tap on Default apps
  5. Tap on desired Category
  6. Tap on desired default app

Samsung Instructions