Lol how exactly would I provide proof? In what form? Showing you every illustrators artwork in history? Not sure why you don't believe me as I'm in the industry, have studied the history of illustration, and follow all the illustration annuals. Take care.

Look it's very obvious. If you're not in the industry or follow illustrators idk what to tell you.

If you were in the illo world you'd be able to see this as a hyper specific style. It's exactly the same as her faces.

Sure but this is nearly an exact trace of a face she drew. I'm in the illustration world and have not seen this hyper specific style. The broad style of exaggerated forms and line and marker sure. But this is specifically Amanda's style down to the square format and exact face. There's nothing wrong with being inspired and paying homage, but you should credit the artist you're mimicking.

Honestly this is exactly her style, I was looking for her signature in the corner. I think you took it a little too from being inspired. You can use her techniques but not draw characters the exact same way she does. Artists spend forever developing their signature style so to have someone rip it off is devastating.