Because she needs money for her legal team to fund lawsuits. If you don't want to pay the nation's top lawyers to sue investigate election fraud, you don't have to.

Sidney is concerned as she stated she is not seeing enough action to investigate this. What do we really know other than a lot of claims and some sketchy screenshots and videos?

I believe she is filing on behalf of citizens under the equal protections clause as opposed to on behalf of the campaign. Putting a solid case together this quick ain't cheap.