accordian category menu like this site?

i’ve gone through a bunch of accordion menu widgets, but haven’t found one that fits my bill.

i just want one button that says “categories” or “archives”, etc. and when clicked on, it expands out.

like this site, in the sidebar it has a gray categories and archives menu box: https://www.weddingchicks.com

if you know of one, could you please point me to it? TY!!