@Lean Junio Thanks for asking question! Could you please try to grant the access to the organization you want to see while creating the Static Web App?
You can do so from here: - https://github.com/settings/connections/applications/c98ca422fdc82b48e87d
Just in case if you are not able to reach here using the link above, please follow the steps below,
• Go to GitHub Settings from top right corner
• Select Applications from the left side menu
• Go to Authorized OAuth Apps from the tabs shown
• And then select Azure Static Web Apps from the list