Regarding SVG File Rejection for Quality Issues

The preview alone cannot reveal the moderator's exact trigger, so I would test the SVG structure before changing the artwork. In Illustrator, use Outline view and Select All, then delete hidden or empty layers and anything outside the artboard. Check RGB mode, an artboard origin of 0,0, a 15 to 65 MP artboard, outlined fonts and strokes, closed filled paths, and no linked or raster objects. Reopen the exported SVG in a browser and a second vector app; if anything shifts or disappears, fix that first. Submit one cleaned file as a test. If it passes, change one variable at a time on the second file instead of guessing at several visual changes at once.

Nothing stands out to me with regard to quality issues. You might try removing the little circles and stars and resubmitting. I’m not sure why they need to be there, and a buyer might conceivably need to take the time to delete them.