Those investigations are still ongoing.
I've posted the below before. Are you too slow to understand the below? Or, do you just refuse to face reality?
Far from “clearing” or “exonerating” the Trump campaign for misconduct, Mueller found numerous links between individuals with ties to the Russian government and individuals associated with the Trump Campaign, but insufficient evidence “to charge a broader conspiracy” with Russian efforts to influence the election. Would an investigation free from obstruction have established evidence sufficient for criminal conspiracy charges?
Mueller documented numerous efforts by Trump and his associates that prevented his team from gathering the evidence that it sought. Despite Attorney General William Barr’s characterization of the White House as “fully cooperative with the Special Counsel’s investigation,” the Mueller report paints a different picture. Mueller wrote about numerous instances in which witnesses lied or withheld information, deleted communications and used encrypted messaging applications. Other practical obstacles prevented Mueller from completing his investigation, including some witnesses’ refusal to answer questions on the basis of their Fifth Amendment privilege against self-incrimination, other legal privileges and the inability to obtain evidence located overseas.