Hello,

I have been looking into your question and my suggestion is to take a look at our Excel Library which gives you the opportunity to create separate worksheets, populate them with required data and format them per your requirement.
More about it can be found in our documentation under the Excel Library section.

If you require any further assistance on the matter, please let me know.

Sincerely,
Teodosia Hristodorova
Software Developer

An approach I could suggest is to use WorksheetImage. In its constructor, you need to pass a base64 string of the required image. Afterward, you need to set its position and add it to the Worksheet shapes collection. For example:

 const wb = new Workbook(WorkbookFormat.Excel2007);
    const imageSheet = wb.worksheets().add('Image');
    const img = new WorksheetImage(this.imageBase64);
    img.topLeftCornerCell = imageSheet.rows(0).cells(0);
    img.topLeftCornerPosition = new Point(0, 0);
    img.bottomRightCornerCell = imageSheet.rows(2).cells(2);
    img.bottomRightCornerPosition = new Point(50, 50);
    img.setBoundsInTwips(imageSheet, img.getBoundsInTwips());
    imageSheet.shapes().add(img);
    this.wb = wb;

Please test it on your side and let me know if I may be of any further assistance.

Sincerely,
Teodosia Hristodorova
Software Developer