I think you’re missing the point that a fraud doesn’t cease being a fraud... only because some arbitrary timeline is exceeded. The fraud... addressed in a civil suit... isn’t prevented from being heard by a court because some third party candidate for office has some other issue with the electoral process or the laws governing it ?
Sidney isn’t a candidate... so the expiry of a timeline that perhaps matters to some candidate... has no significance in relation to her status, or her claims ?
You’d have to ask separate questions... about the harms done that she’s addressing... and the remedies available ?
As a non-candidate... the electoral calendar doesn’t apply to Sidney Powell’s case...