Hello OR-Marketing
I have successfully accessed your administrator and added an SP Page Builder page for your reference. You can check it: https://or-marketing.eu/component/sppagebuilder/?view=page&id=47
I have checked your mentioned page on laptop and mobile. There is no issue found. Is the issue happening only on iPad? Your page loads a little slow. Please wait for the page to load. Also clear your Joomla cache and Browser's cache and then check. If possible, then check with a different browser on iPad.
Best regards