It all works BUT… I notice some CSS issues on activation, such as the category links which are now an unstyled list or the images on the product page which are displayed larger than they should be so the description is pushed below.
If I activate the parent theme then it’s all fine again.
When importing a Site like Niche it adds CSS to Customizer > Additional CSS. This gets stored with the theme, and by activating the Child Theme removes it.
Deactivate the child theme temporarily – the styling should return. Now go copy the CSS from the Customizer > Additional CSS. Now re-activate the Child Them and paste the CSS this into your Child Theme styles.css file