Hi, I' using : Joomla 4.4, SP Page builder pro 5.1.6, newsberg template

I want to add custom field to Article I created custoim field, inserted into articel trough joomla editor using {field 8} and it works problems start when I switch to SP Page builder and save article, field is no longer visible I try to insert {field 8} into element "raw html" code, but then it just renders "{field 8}" not the field value Is there any way to insert custom fields using SP Page builder ?

Thanks in advance Best regards Aleksandar