Platform where people share mental health treatment experiences

I am seeking a UK legal expert to conduct a comprehensive review of GDPR compliance for a community-driven platform designed for individuals in the UK to share their mental health treatment experiences. The platform will facilitate the sharing of personal health data, which will be anonymised, while aggregated data may be commercialised to third parties. Having previously collaborated with a solicitor on the Terms & Conditions, Privacy Policy, and Cookies Policy, I now require a final evaluation of these documents, ensuring they meet current legal standards, along with formal sign-off of the platform by a qualified legal professional.