Custom Margins for Kindle Kids Edition

I am used to having very small left and right margins, on my eReader, using these older-model instructions:

https://wiki.mobileread.com/wiki/Kin..._Change_Margin

Is there some comparable tweak for my new Kindle Kids Edition (same hardware as the 10th generation basic Kindle announced March 20, 2019)?

I will not be wanting any other deviation from what's available in the stock user interface.