Are the cookies -zldt and -zldp technically necessary or how do we block them before cookie consent is given?

Hello,

we are in the process of making our website more privacy compliant and have implemented a new cookie banner.

Our website has SalesIQ and Zoho CRM embedded into it.

The following cookies are set before it comes to consent to the cookie statement.:

-_zldt
-_zldp

Those appear to be related to SalesIQ according to:
https://www.zoho.com/salesiq/cookies-policy.html

So, my question is:

Are these cookies technically necessary and are they already allowed to be active before consenting to the cookie declaration?

And if not, how do I block the cookies before consent?

Thank you