Hello @Precious04 and thank you for your question.
Wefugees and our experts are based in Germany, therefore we can unfortunately share little information about asylum and residence procedures in other countries. In Germany, for instance, it would be hardly possible to get married without submitting the passport. Usually a range of documents will be required and the procedure can get quite complicated.
I would recommend you to get in touch with organisations like the Finish Refugee Council which are more familiar with the regulations in Finland. In my research I also found the Finnish Refugee Advice Centre which apparently has a free of charge legal advice hotline.
I hope this helps.
All the best,
Meike