Styling with page builder

Hi Guys,
When using a page builder like Beaver Builder Themer or Elemtor etc,
how can we style the payment page?

Following your guide https://help.blockonomics.co/support/solutions/articles/33000243991-customizing-branding-checkout-page-appreance
relies on loading theme php templates, whereas Beaver Themer has the layout parts and templates stored in the Admin dashboard.

I can’t see what ‘page’ or content type to us a triggere for your payment section as it not part of wc checkout or anything.

Thanks