Examples needed: a toggle that shows a higher-contrast version of a site

Can someone give me examples of a feature that toggles to a high-contrast version of the website?

I am only able to find 2 live website examples:

https://www.smashingmagazine.com/?source=post_page---------------------------

https://turbotax.intuit.com/

I am doing a toggle switch to increase the contrast on my e-commerce website but was not able to find many other e-commerce website doing so.

Can someone give me a reference to this color-contrast toggle which other websites are using?

I want a reference for those sites which actually uses this feature