How to enable swipe to unlock in KOReader on Kindle?

I'm using a Kindle Oasis 3 which is an ad-supported version. I just got it jailbroken and installed KOReader. I didn't install the screensaver hack, as the ads don't bother me that much.

KOReader is great. There is only one problem for me at the moment. While in KOReader, if I press the power button, it goes into sleep mode, fine. But if I press power button in sleep, it didn't go through the "swipe to unlock" step as kindle does. It just unlocked itself, without a swipe. This is not ideal, as the kindle could be unlocked accidentally.

I searched the github repo and this forum. I couldn't find a definitive answer. The closest one I found was this github discussion: https://github.com/koreader/koreader/discussions/13311. It mentioned some option "(config/screen/suspend screen/wallpaper/postpone screen update.../until "gesture so quit ...")*" or something along the line. But I couldn't find a "suspend screen" or screensaver option under config->screen. Is it because my Kindle is an ad-supported version? Will this config->screen->screensaver option show up after installing screensaver hack?

Or more generally, for a Kindle with ad-support, what is the correct way to config KOReader to swipe to unlock after waking up from sleep by pressing the power button?

Thanks!