I recently implemented consent mode v2 using Google Tab Manager Server. In principle it works well and respects user preferences regarding cookie consent, but there are 2 cookies that continue to appear regardless of this consent and they are FPAU and FPGSID. Does anyone know what these cookies are for and how to delete them?

I have a custom GTM tag template in which I try to use the getCookieValues API by specifying the cookie name.
I can see that the cookie exists on the website and has a value. But when I run the template code, getCookieValues always gives me empty value. I have the appropriate permission set for reading ‘any cookies’.