In this post, let's see how to make an HTTP POST request from an SharePoint Framework (SPFx) web part. There are lots of posts out already which show you how to make a GET request so I will not cover that here. It is fairly straightforward once you understand all the moving parts.
Import the necessary modules in your SPFx webpart code:
Now, the code which makes a POST request to create a list:
And my "Developer workbench" list is created:
Hope this helps.