This pattern is not consistent with ringing. To test this theory, print a cube primitive using the same settings and compare the results. The cube’s right angles will make it easier to determine if ringing is present.
Additionally, please upload __your_ 3MF file as it was before you printed it. The image on your screen does not match the original 3MF from MakerWorld, which uses unoptimized default settings. Just because a file is on MakerWorld doesn’t mean the uploader knows what they’re doing. There are clear signs that this model was poorly configured for its size.
Based on the pattern in your uploaded image, I’d wager you’re using gyroid infill.
Finally, post a screenshot of the sliced model on your build plate and use the slider to show what the interior model looked like after slicing.
Here’s an example.
