quality issues?

Your picture is not the size you submitted. So, it's a different quality as submitted.

But even so, I see many issues with your asset that will only be amplified, when you resize:

The young man looks awkwardly upwards. It's not directly a technical quality issue, but you still need to correct that, if you want to make many sales. Like this, it's more like a walking dead man.

The woman's nose needs to be corrected:

You have a similar issue with the eyes:

The eyes of the young man to the left have been addressed before:

The lady's hair is interwoven with the gentleman's ear:

You should edit this element out, as it looks like it's growing out of the left man's cheek:

The white border visible at several places comes either from the AI trying to paste the woman into the background, or from sharpening. You need to correct that everywhere:

The hair does not merge well with the background here:

This rendering error with the jacket has to be addressed (man to the right):

Idem here, where the AI gets confused with the foreground/background rendering.

I would also correct the buttons on the far-right man's shirt:

Far-left man's shirt: the buttons don't look naturally like buttons. That may or may not be an issue:

The only thing that does not disturb me here is the background.