If you want to hide conversations, we can move them to the archive on the LG smartphone, so the news (entire conversation) will no longer be visible on the app's home screen. The archive can be accessed via the menu, where you can also remove the conversations from the archive.

Android 9 | LG UX 9.0
Archive conversations -  Open the  Messages -App
Archive conversations -  Tap on desired  Conversation
Archive conversations -  Open the  Menu
Archive conversations -  Tap on  Archive
  1. Open the Messages-App
  2. Tap on desired Conversation
  3. Open the Menu
  4. Tap on Archive

LG Instructions