Dear Bilal,
ByDesign supports various formats for Payments and Bank Statements.
If you search the online help in your system for "Electronic Payment Formarts", you get a list of all payment formats SAP delivers in standard, e.g. . If you search for "Electronic Bank Statement File Formats" you get the SAP supported bank statement formats.
To answer your question: yes, ByDesign supports SEPA XML in view countries, e.g. SEPA Credit Transfers in Germany, Austria and other countries.
To make it complete, there are more SCN threads in this group, which describe, how to implement your own format in ByDesign.
Best regards
Marlene