Policy change sync timing

We are using Zero Trust DNS to filter inappropriate websites. When we identify a website that is being blocked, that we do not want blocked, we add a Firewall/DNS policy to allow said website. How are we able to force the change through to our client machines so that the change takes effect sooner rather than later? A recent change took days to take effect. Is there a way to force the syncronisation of firewall policies so that our users are able to enjoy the change in hours, not days?