Well, there are two levels of the “lockscreen check”:
Before the patch was made, when my Xperia 10 III was still running AppSupport 11, I had already set a lockscreen pin using these instructions:
After that, I could use a security feature of one banking app I use, which checks for a lockscreen to allow you to use only one password to unlock the app. For using Wero in the other banking app, I actually needed to enter the lockscreen PIN, for which the patch with the stub implementation of keyguard was needed.
I don’t know what kind Alfabeto is using (just checking or actually using the lockscreen) so maybe you have a chance!