Can i add page in my layout

From help https://www.google.com/url?sa=t&source=web&rct=j&url=https://helpx.adobe.com/pdf/incopy_reference.pdf&ved=2ahUKEwjatIfz9e72AhVGCRAIHVM5BhUQFnoECAQQAQ&usg=AOvVaw2bz2V-XRi9Tez4R7umV5Mm :

Work with stand-alone documents An InCopy document that is not associated with an InDesign document is called a stand-alone document. You can set up and modify the text area, page size, and orientation for stand-alone documents. However, if the story is later linked to an InDesign document, the InDesign settings override the settings used in InCopy. Note: You can also click Save Preset to save document settings for future use. When creating a new document, you can simply choose it from the Document Preset menu and click OK without having to change any settings. If you’re working in an editorial workgroup, these saved presets can be shared with other members of your team. (See Define custom document presets.) Create a stand-alone document 1 Choose File > New. 2 To create a document that does not have facing pages in each spread, deselect Facing Pages. 3 From the Text Area menu, choose Frame Grid to create a document with a grid into which Japanese characters are set, or choose Text Frame to create a plain text frame. (See About frame grids in InCopy documents.) 4 Under Text Area, type values for Width and Depth. Text dimensions provide accurate line break information without relying on InDesign for copyfit information. 5 Specify whether the text direction is horizontal or vertical. You can change this setting any time by choosing Type > Writing Direction > Horizontal or Vertical. 6 In the Grid Attributes section, specify the frame grid characteristics for vertical and horizontal scaling, character aki, and line aki. (See Document setup options for frame grids.) These grid attributes do not appear if you’re creating a plain text frame. 7 Choose a page size from the list, or type values for Width and Height. Page size represents the final size you want after bleeds or other marks outside the page are trimmed. 8 Click OK. Open a stand-alone document You can open an InCopy content file (.icml) that has been created in InCopy or exported from InDesign. When opened in InCopy, these InCopy content files will not show the page geometry from the InDesign layout. You can also open documents from previous versions of InCopy, and you can open InCopy template files (.icmt). You can also open Microsoft® Word and text files directly in InCopy, and then save them as Text Only (.TXT) or Rich Text Format (.RTF). 1 Choose File > Open. 2 Select the document, and then click Open. You can also choose File > Open Recent, and select one of the documents you saved recently. To specify how many recent documents are displayed, choose Edit > Preferences > File Handling (Windows), or InCopy > Preferences > File Handling, and then specify a number for Number Of Recent Items To Display. Change document layout 1 In any view of a stand-alone document, choose File > Document Setup. 2 Select basic layout options in the dialog box that appears. 3 Click OK.

InCopy is content editing only. You cannot add pages or manage the layout in any way.

For this you need InDesign.