Wagner Group is nothing like the security group Blackwater.
Wagner is an actual army fighting a war with Russian war equipment, leading the army into war and flying jets and using tanks, conquering cities.
In Iraq Blackwater operatives escorted convoys, provided security at numerous sites, interrogated prisoners and obtained intelligence, had documented pitched battles with insurgents. In short they did everything that would have to be done by American troops, took casualties and freed American troops for other duties. They also had their own armored vehicles and helicopters. Such is war everywhere.