In order for the posting process to initiate the eInvoice Poland Romania process, manual configuration needs to be done in the BTEs (Business Transaction Events) configuration transaction.
...
There is the option to add a filter by country to activate it only based on the country of the company. To do this, the country would need to ISO code of the country should be added in the 'Ps' “Crt” field.
Here is an example without a country filter:
...