My website crashes on safari on iphone but not on android, ipad or desktop

Question:
My website crashes on safari on iphone but not on android, ipad or desktop. How is this possible? I tried everything, I do have 2 domains connected to 1 site. Studioruub.nl and Barretje.com

To address your website crashing on Safari for iPhone, focus on simplifying and optimizing your site’s code and content to ensure compatibility and performance. Prioritize debugging with Safari’s developer tools to identify potential issues like unsupported CSS or JavaScript, heavy resource usage, or SSL and domain conflicts. Streamline images, scripts, and animations to reduce resource demands, and temporarily disable custom code to isolate any problematic elements. Test your site in chunks to pinpoint the issue, ensuring all elements are compatible with Safari’s specific requirements. Finally, confirm both domains are correctly configured and free of conflicts.