Is there a way to bypass XSS errors in CxSAST Scan?

You can turn off XSS queries in the preset selected for your project if you are getting false-positive results. If it is a web application, it is not advisable to do this.

It isn't clear from your question, but if you are scanning the jquery library you will probably want to exclude it from the scan via the folder/file exclusions. If the results are showing you sources in the jquery methods, this would indicate you are scanning the jquery library. Excluding it will also likely improve your scan performance.

The general rule is to scan only the code which you maintain and is deployed to production. This means you exclude things like third-party code, unit tests, integration tests, etc.

More results on a new version would not be uncommon, especially in a jump from 8.x to 9.3. There were several improvement efforts on Javascript in the recent past (8.9+) to improve accuracy. You'll probably want to set up your exclusions then take a very close look at the results to make sure they are not true-positive results.