HW3 does get updates too. According to TeslaFi.com Firmware Tracker, HW3 is seeing the following versions:
Which version are you on?
- 2019.24.4 - 10%
- 2019.20.4.3 - 44%
- 2019.20.4.2 - 40%
- 2019.20.2.1 - 2%
- 2019.16.3.2 - 4%
P.S. Welcome to TMC!
teslafi.com is not reporting any Model 3 HW3 getting 2019.24.4
check again down to the webpage for 2019.24.4 breakdown of each model and HW version it has.