There's no functionality for directly displaying them on profile. They have a separate page. A link to such a page should already be under their Subscriptions tab to view their invoices. If you want a link to the payment history page instead or in addition to invoices page then within CBSubs > Settings > Display > Invoices set "Show payments history" to "Yes". You can also create Joomla menu items to both pages by selecting a menu type of Community Builder > Plugin then for plugin select CB Paid Subscriptions.