Accessibility ToolBar - Is there a way to extract code from a plugin?

Hi - I have been asked by my client to add an accessibility toolbar to her site - she likes this one… https://wpaccessibility.io/ which comes as a WP plug in. I am wondering if there is any way to extract code from a plug in? Or does anyone know of a similar accessibility toolbar which is compatible with WIX?

It’s a plug in for Wordpress. You can’t use it on Wix.