This app can keep multiple widgets at screensaver since 2015.
https://apkpure.com/daydream-widgets/com.shiraseapps.daydreamwidgets
Wow amazing! I never found this one, too bad it's not in the play store anymore and not updated in this long...
I do like the multiple page system, so that the widgets alternate. Maybe that's something I'll implement as well. I however don't see a burn-in protected multi-widget option in the app, so that's something I could maybe do better
Anyways, first I have to finish the widget setup activity (which I'm currently working on), so that all widgets can be set-up and resized correctly