Hello Jos,
Apologies for the inconvenience.
SP Page Builder does not provide styling or design customization options for third-party extensions such as ChronoForms. When a ChronoForms form is embedded or displayed on an SP Page Builder page, its appearance—including fonts, colors, spacing, fields, and other styling—is primarily controlled by ChronoForms and the CSS provided by the extension itself.
Therefore, to customize the form's appearance, you would need to use the styling options available within ChronoForms or apply custom CSS to the form.
I hope this clarifies how the styling works.
Best regards