The test file at https://github.com/mozilla/pdf.js/blob/master/test/pdfs/annotation-choice-widget.pdf contains listboxes, which are not rendered correctly when printed right now. These kinds of fields are made by https://github.com/mozilla/pdf.js/blob/master/src/display/annotation_layer.js#L672-L678.

/cc @calixteman 
metrics = {
        width: 0.791 * fontSize,
        height: 0.705 * fontSize,
      };
      char = "\x6C";
    } else {
      unreachable(`_getDefaultCheckedAppearance - unsupported type: ${type}`);
    }
    
    const xShift = (width - metrics.width) / 2;
    const yShift = (height - metrics.height) / 2;
    const appearance = `q BT /PdfJsZaDb ${fontSize} Tf 0 g ${xShift} ${yShift} Td (${char}) Tj ET Q`;
    const appearanceStreamDict = new Dict(params.xref);
    appearanceStreamDict.set("FormType", 1);
    appearanceStreamDict.set("Subtype", Name.get("Form"));
    appearanceStreamDict.set("Type", Name.get("XObject"));
    appearanceStreamDict.set("BBox", bbox);
    appearanceStreamDict.set("Matrix", [1, 0, 0, 1, 0, 0]);
    appearanceStreamDict.set("Length", appearance.length);
    const resources = new Dict(params.xref);
    const font = new Dict(params.xref);
    font.set("PdfJsZaDb", this.fallbackFontDict);
    resources.set("Font", font);
    appearanceStreamDict.set("Resources", resources);
    this.checkedAppearance = new StringStream(appearance);
    this.checkedAppearance.dict = appearanceStreamDict;
    this._streams.push(this.checkedAppearance);
  }
  _processCheckBox(params) {