What can be created with no-code tools?

I am a product designer and have some knowledge of no-code tools. I knew we could create simple websites and a few automation.

But today I came across a product and gained incredible knowledge. There are big companies that use no-code tools. I'm not just talking about site builders like WordPress. There were SaaSs that was created entirely with no-code, not a single line of code was written.

If you are interested in no-code, I definitely recommend this info product;
https://www.producthunt.com/posts/become-a-nocoder