Yes, you need to signup for beta testing via the Google Play Store. All slots were filled a few months ago, but some may have opened up by now. Acceptance (by Google) may take a few days so try not to get too worried. Once accepted, the beta app version will appear as a Wyze app update on your phone/tablet. Once you have the beta Wyze app, to get the firmware update, you’ll need to go to Wyze app Home > Account > About > Beta Program > Edit > select the Wyze Cam v3 checkbox > Save. Then check for firmware updates.
If you are considering jumping to beta, please keep in mind that the purpose of beta is to assist Wyze in uncovering and reporting bugs and usability issues before software and firmware enhancements are released to the general public. That means you will most likely encounter issues… some minor and some major. If you value stability or rely on your Wyze products for security, you may wish to reconsider joining beta.