Okay, lets look at the first paper: https://www.sciencedirect.com/science/article/pii/S0753332223001798

Volunteers were randomly assigned to 1 of 3 experimental groups and orally treated with IVM as either, a tablet, solution, or capsules at 0.4 mg/kg in a three-phase crossover design. Blood samples were taken as dried blood spots (DBS) between 2 and 48 h post-treatment and IVM was analyzed by HPLC with fluorescence detection. IVM Cmax value was higher (P < 0.05) after the administration of the oral solution compared to treatments with both solid preparations. The oral solution resulted in a significantly higher IVM systemic exposure (AUC: 1653 ng h/mL) compared to the tablet (1056 ng h/mL) and capsule (996 ng h/mL) formulations. The simulation of a 5-day repeated administration for each formulation did not show a significant systemic accumulation.

So Ivermectin was given to three groups 3 different ways and the amount of Ivermectin in the blood was measured for each group. No one had CoVID. The effect on covid was not measured. The only thing that was measured was the efficiency of getting Ivermectin into the blood.

That doesn't show effectiveness against covid does it?