Kia Optima A/C - Add oil or not after changing expansion valve and compressor control valve?

I plan to change the A/C expansion valve and the compressor control valve in my 2013 Optima. After proper vacuum, do I just add r134a Freon or do I need to add oil as well. I’m assuming since I am not changing the compressor, the oil remains, but I don’t want to make assumptions here. Appreciate your help. Thanks.