Homologation papers for exhaust

Hi,

I bought used KTM Duke 390 2021 with exhaust IXRACE M9 Dualexit Black Edition. I got the bike from Germany and I live in Croatia.

Problem is, I have receipt of the exhaust, but no documents that are needed for homologation of exhaust.

How can I get that documents? I can’t get the exhaust homologated otherwise.

Thanks