Custom Fields in Invoice Template not displayed

Good morning

I can’t get custom fields to appear in the html pdf invoice template, in my case, such as:

{{ customer.domicilio_instalacion2 }}

{{ customer.domilicio_instalacion1 }}

{{ customer.bic }}

{{ customer.iban }}

The default fields of splynx appear without problems

When loading the html template, these values appear to me blank:

check please:

{{ customer.additionalAttributes.attribute_name }}

Ok, now it works!

Thank you

Thank for the tips @ex. I was actually looking for this. For invoice template I still depend on accounting software.