From the GAMLS for Atlanta:
Total Residential Units Sold in March 2021 were 9,021, up 14.6% from 7,874 in March 2020.
Active Residential Listings in March 2021 were 7,418, down 58.3% from 17,802 in March 2020.
Months of Supply was 0.89 Months in March 2021, compared to 2.27 Months in March 2020.
This graph from the Georgia MLS shows inventory in Atlanta over the last several years - and the sharp decline in inventory at the start of the pandemic.