Usually after covid period or after you are sick, most people are still in the stage of recovering mode and trying to gain those big appetite that they have not been getting since they fall sick. You can try eat in small meals instead of big meals/big portion. Eat more healthy and nutritious food as well as taking your pre natal vitamins & materna milk. This way even if you dont eat much like before, you are still gaining weight and baby receiving enough nutrients. Hope this tips help. I dont gain much too during pregnancy. I dont bother much as long as I am within the BMI and baby is doing good with acceptable weight range too.