We could use:
https://github.com/mozilla/pdf.js/blob/c3d08580627471432a6ad0b2fdb948df64126afa/src/display/api.js#L929

and look at bit 4.

The following pdf:
https://orimi.com/pdf-test.pdf
is not editable in neither Acrobat nor Edge nor Foxit and nor Okular.
const [openAction, javaScript] = await Promise.all([
      openActionPromise,
      !this.pdfViewer.enableScripting ? pdfDocument.getJavaScript() : null,
    ]);
    if (pdfDocument !== this.pdfDocument) {
      return; 
    }
    let triggerAutoPrint = false;
    if (openAction?.action === "Print") {
      triggerAutoPrint = true;
    }
    if (javaScript) {
      javaScript.some(js => {
        if (!js) {
          
          return false;
        }
        console.warn("Warning: JavaScript support is not enabled");
        this.fallback(UNSUPPORTED_FEATURES.javaScript);
        return true;
      });
      if (!triggerAutoPrint) {