FAQ
A Unitary Patent may be requested for any European patent granted on or after the date of...
https://www.epo.org/en/service-support/faq/myepo-services/web-form-filing/unitary-patent
Unitary Patent
Questions and answers
FAQ
Neither Online Filing (OLF) nor OLF 2.0 supports XML filings (i.e. attaching the form as an XML)...