Kari Lake knows she has no chance of overturning the District Court on Appeal. She knows this, and her lawyers know this.
She also knows that she will be seen as giving up if she doesn't file. This is not a good look for someone who is fundraising off the litigation.
When she loses on appeal, she will file for cert with #SCOTUS; it will be denied, but she has to be seen as fighting, or the money stops.