Want to change DNS server

Hello

I am using wgcf configuration to use NextDNS alongside Cloudflare Warp +.

I configured the wgcf profile, entered the ipv4 and ipv6 adress at nextdns setup page it works, but it chooses edgeuno-ist with 33ms instead zepto-ist with 3ms.

How can i switch to zepto-ist?

Thanks