As a person with training, I will say this. She could have used her hands to do chest compressions to oxygenate blood and move it through his system. She didn't need anything else until more advanced help would arrive as she didn't have access to any other items.
There was not a disgrace in these people stating what they saw. Chauvin and his team had a duty of care as Mr. Floyd was in their custody. If he was unconscious, the training I have is that the person is checked for breathing and pulse, if breathing and pulse but unconscious they are placed in the recovery position. If not breathing but pulse, you check the airway for any issues. If not breathing and no pulse, you begin compressions as the brain and other tissues with rapidly deteriorate and lessen the chance of survival.
Mr. Floyd would be unable to get up easily if he regained consciousness as he was cuffed. The LE could have left the other two on his low body and he would not have been able to move at all.
According to the training I have (done with Fire, Rescue, and Police), she was right to say what was needed. They gave no aid and didn't perform the assessments that they should have after he lost consciousness.