As of my last knowledge update in January 2022, I don’t have specific information about Cristiano Ronaldo visiting the CR7 museum and posing next to the wax statue of his son in Saudi Arabia.

Events and activities involving celebrities can occur after my last update, and I don’t have real-time information.

If this event has taken place, it seems like a unique and personal moment for Cristiano Ronaldo and his fans. Fans often appreciate and get excited about seeing celebrities share personal and meaningful experiences. For the latest and most accurate information, I recommend checking Cristiano Ronaldo’s official social media accounts or recent news sources for updates on his activities.