Hi all part of my pepperomia plant. is wilting
I water it when it's completely dry

Right side is wilted left side is nice and fleshy
Can anyone help with the problem?

Has it been sunburned?

Don't know Greene
It was near a window with filtered light some sun in early morning

Peperomias are semi-succulents and they should not get completely dried out. Water when the top quarter of the soil feels dry.

Thanks WillC
What do I do now to make it better?

The damaged leaves probably will not recover and may have to be trimmed off if they are unsightly. All you can do is increase the watering. Healthy new growth should come in slowly. Be patient.