The aim of European partnerships with EU and associated countries, the private sector, foundations and other stakeholders is to deliver on global challenges and modernize industry.
The EC published a page on the types of partnerships, how partnerships are being identified, candidates for partnerships, contact details, impact assessments.
The Horizon Europe proposal lays down the conditions and principles for establishing European Partnerships. There are 3 types:
Co-programmed European Partnerships
Co-funded European Partnerships using a programme co-fund action
Institutionalised European Partnerships
More details here.