How to disable creation of multiple users option completely?

I'm looking to disable the option for creating more than one user on my Pixel 6a phone (running Calyx OS). The standard way to do it seems to be [this](https://www.droidviews.com/remove-guest-account-feature-on-android/) . However, this requires TWRP which is [not available](https://twrp.me/Devices/) for Pixel 6a. Alternately, The BuildProp editor app that they recommend is no longer available on the Play Store. Is there a way around these limitations?