I can’t sign my returns because it says “ Sign and file your returns The IRS hasn't finalized one or more of your forms. Once forms are finalized, you will be able to access this

No, you are not being audited. There is a tax form necessary to complete your tax return that is not finalized yet by the IRS. They are still in the process of coming up with the final version of the form, so you can't file it yet. As soon as the form has been finalized, you will be able to submit your tax return.