My submissions were rejected and I don't know why.

The only reason i can think of is kewyword spam.

By @JPV415

How do you get to that conclusion? What is the refusal reason for each of the assets?

Can anyone spot issues with a few of the images i submitted?

By @JPV415

Where are your keywords used? If you are suspecting keyword spam, you should at least give us the opportunity to check those.

Also is it possible to reupload declined submissions without having to redo the Title and Keywords?

By @JPV415

No, you need to title and keyword again. But first you need to detect why the assets got rejected.

Your first has obvious rendering errors.

(besides the rendering errors and the upscale errors, the glasses should be crisp sharp!)

With your green woman, you could argue that this is a kind of oil painting, but as such, there are too many inconsistencies:

Your flying steampunk woman has flattened contrasts (you see that in the histogram which is flattened at the beginning and the end):

As this makes lovely effects, filters as this are not desired for stock.

Checked at 100% your woman is not focussed:

In addition, there are massively other rendering errors present:

This looks like an unfinished work of the generative AI image algorithm. If you know that all those programs tend to split the asset into small squares to have an easier job, I would say that someone just interrupted the generator in the middle of its creative phase. Seeing the result of the high contrast parts, it looks to me, that the “inspiration” comes from comic books.

As for the robot, I detected some easy to fix artefacts:

But the overall picture looks like an over sharpened painting.

As for your Saint Patrick's oil painting style picture: there are elements that simply make the oil painting unbelievable.

You should also correct his right eye.