We can copy received or sent SMS messages from a conversation and paste them back to another field, storing the message or content in the Huawei smartphone's cache for retrieval at any time.

Android 10 | EMUI 10.0
Copy SMS message -  Open the  Messages app
Copy SMS message -  Choose a  conversation
Copy SMS message -  Tap and hold a  message
Copy SMS message -  Tap on  Copy
  1. Open the Messages app
  2. Choose a conversation
  3. Tap and hold a message
  4. Tap on Copy

Huawei Instructions