Hi @SSnoei and Happy Tuesday!
Great questions, thanks for asking the HubSpot Community!
To start with, I’d like to share these resources that can point you in the right direction:
- Consent banner API - HubSpot docs
- Enable do not track - HubSpot docs
- Add privacy consent listener - HubSpot docs
And here are solutions I found on similar topics that might help:
- Any best practices on how to implement 3rd party cookie tools? (Onetrust, Cookiebot)
- Block non essential Hubspot cookie on Hubspot CMS when using external cookie consent system
- Managing HubSpot cookies when you use a third party cookie management tool
Also, I’d love to put you in touch with our Top Experts: Hi @Anton, @SteveHTM and @evaldas do you have any tips to help @SSnoei set up HubSpot CMS with a third-party CMP so that no HubSpot cookies or tracking requests are set before user consent, please?
Thanks so much and have a lovely day! 
Bérangère