I found this ibo4k application in archive org. it works with ibo panel posted here, editing is simple in smali.
it has been modified and doesn't look like the original but with a lot of love you can get good results, the wallpapers are changed from the apk

instructions look for the following line smali/b/b/a/r.smali: https://yoururl.com/panelibo-4k
it is important to keep the number of characters