6 months post op - could I possible be experiencing lateral displacement? (photos)

To make equality assessment regarding the outcome of any plastic surgery procedure we generally need to see proper before and after pictures.
It’s difficult to follow your series of pictures without knowing the timeframe.
We also need to see before pictures to have a better understanding of where you started.
I think It’s fairly clear that your breast wide on your chest as baseline.
Most individual the left breast will sit higher on the chest wall than the right side.
This is usually determined by the position of the IMF (infra mammary fold)
In a sub pectoral breast augmentation, the pectoralis muscle should be supporting the weight of the implant.
When that’s not the case the weight of the implant can put pressure on the breast tissue creating gradually increasing recurrent breast ptosis.
This may or may not be the case for you.
If you’re not getting the car, you need from your current provider, then I suggest you collect a complete set of all before and after pictures and a copy of your previous operative report and schedule a few in person second opinion consultations with other plastic surgeons in your community.
To make a quality assessment we need quality information.
This would ideally also include an examination but at a minimum access to an operative report, and all before, and after pictures.
You can request copies of your medical record from your current provider by simply asking.
Ask them to forward all before and after pictures taken and a copy of your operative report or the entire medical record.
The rate of revision surgery after mastopexy augmentation is fairly high.
In my opinion it’s important to leave as much of the pectoral is muscle intact as possible to allow the muscle to support the weight of the implant. This can be technically challenging without leaving the implant positions too high. Failure to keep enough of the pectoral is muscle origin attached to the chest wall can cause the implant to slip down putting added gravitational pull on the skin envelope of the breast. This can add to persistent droopiest of the breast over time requiring retightening of the breast skin.
Best,
Mats Hagstrom MD