There is absolutely no evidence whatsoever of any hacking. Period. There is no reason to believe it occurred. This is just leftists grieving about losing the election, and refusing to admit they nominated a terrible candidate and adopted a platform that is actively repellant to voters in states they needed to win.
By all means, the IC should be double-checking to ensure the vote was legitimate. But the left needs to accept that it was and move past the insane conspiracy theory stage of the grieving process.