The Czech Republic is part of the European Data Protection Board and has imposed fines for GDPR infringements, such as a 13.9 million EUR fine for violating Art. 6 and Art

 Czech SA imposed fine of 139 million EUR for infringement of Art 6 and Art 13 of GDPR 2 May 2024

13 of GDPR, with other countries like Finland and Italy also issuing administrative fines for data processing violations and accreditation-related decisions being made in accordance with GDPR regulations.
https://www.edpb.europa.eu/our-work-tools/our-documents/member-state/chekhiya_en