DC to DC, Switch Converter

I, usually, prefer to post after a given project has been made and tested, but, this case is different.

I have been requested to make a DC to DC converter. There are many IC's and modules online. I have found this : https://www.amazon.ca/Converter-0-5V-30V-Powering-Speaker-Amplifier/dp/B08KZYSRRG

This can be used without any, additional circuitry, yet, I have decided to make something, which is posted here : https://drive.google.com/drive/folders/1LME3Dg6xhWQB1pt2SPSd0jWdyPnyTgpQ

Please, comment, suggest, correct, inform, etcetera.