Just some notes when I tried to get the concepts for results of COVID19 RNA test.
The definition on official server - you must first login (see uper right corner) and after that, you still only see the text view of definition.
To see it in the usual way, I used the JSON export from atlas server and imported it into atlas-demo.
Then you see it with the codes
I was after how to see the actual coded value: (there is detected via SNOMED and detected via LOINC).
This can be seen here in the JSON from here
and via picture