Without knowing your exact Make & Model Avita laptop the only thing I can recommend is to go to Avita Support and download the AMD I2C driver from them from here: https://www.avita.com/hk/product/admiror-amd/support
Also it is possible that your deleted some Avita own software that your Laptop needs to run correctly. I would open a Avita Support ticket and ask them about installing Windows Home on the laptop that came with Windows S version.
EDIT: Just guessing but by your name avatar you seemed be from India. So here is AVITA INDIA where you can asked them for drivers for your laptop: https://avita-india.com/support
According to Avita Support to update Windows S to Windows Home doesn't involve formatting your laptop but seem to be a Ingrade Upgrade which keeps all the Avita Laptop Apps installed:https://www.avita.com/hk/product/admiror-amd/support
From the bottom of the webpage under FAQ: