how to config cloudflare for my vps to share host

i set up my registra domain point nameserver to cloudflare.
i installed cwp but idk how to config cwp ns/dns bcos i just have 1ip from vps.

i installed cwp and my hostname is sv1.mydomain.com. (i got the issue "rDNS/PTR = FAILED" in cwp)

i added new user with mydomain.com which is cwp address (bcos i can login cwp with ip:2030 or mydomain.com:2030).

i set my vps nameserver is ns1.mydomain.com and ns2.mydomain.com.

in cloudflare panel, mydomain.com is pointed to only 1 vps IP.

and now i added 2nd domain but i dont want to use cloudflare nameserver for 2nd domain.


//Example Main Domain to Hosting with Centos WebPanel

Godaddy domain: abc.com  //use CloudFlare nameservers

Cloudflare: pointed (only 1) vps ip to abc.com as A record

Hostname VPS/CWP: sv1.abc.com

VPS Nameservers:
ns1.abc.com
ns2.abc.com

1st domain: abc.com  //i wanna use cloudflare
2nd domain: def.com //i dont wanna use cloudflare


SO what do i need to change nameservers in vps and cwp or 2 domains nameservers to hosting?

hello anyone help?