In my custom payment module, a checkout_index_index.xml file allows me to display a custom block above the payment options if I add the following xml code:
<referenceContainer name="content"> <block class="Namespace\MyModule\Block\MyBlockClass" before="-" template="Namespace_MyModule::checkout/cart/my-form.phtml"/> </referenceContainer> On that /checkout/#payment page, what I should replace name="content" with in the referencecontainer tag so that my block is displayed in the sidebar on the right, either in the Order Summary block or under ?