Not quite correct. This is from CASA AVMED website: Exemptions and relief measures: COVID-19
An exemption applies automatically to every holder of a CASA issued medical certificate that was valid on 1 March 2020.
The exemption effectively extends the expiry date by six months. My Class 2 expired on the 23rd of July but is now valid until the 23rd of January 2021 and I doubt if I will renew it.