You can scan printed images directly from your scanner into your project.
For Windows, Affinity Photo does not offer scanning directly from within the app. We recommend using your own scanner's software to acquire images.
Your scanner needs to be correctly installed to allow it to be used. You can check the scanner is installed by choosing Apple > System Preferences, then choosing Printers & Scanners.
Your scanned image appears as an 'Untitled' document.