We could mark, copy and paste the contents of an SMS message. If we want to forward a message, the Samsung device offers a very simple function for this. Tap forward, select contact and send - that's it.

Android 10 (One UI 2.0)
Step 1:  Open the  Messages -App
Step 2:  Open a  Conversation
Step 3:  Tap and hold desired  Message
Step 4:  Tap on  Forward
Step 5:  Tap on desired  Contact
Step 6:  Confirm with  Done
Step 7:  Tap on  Send
  1. Open the Messages-App
  2. Open a Conversation
  3. Tap and hold desired Message
  4. Tap on Forward
  5. Tap on desired Contact
  6. Confirm with Done
  7. Tap on Send

Samsung Instructions