You need to remove the third nameserver so that only the 2 Cloudflare nameservers remain:
verdantstores.com. 172800 IN NS ns1.dominios.uol.com.br.
verdantstores.com. 172800 IN NS pam.ns.cloudflare.com.
verdantstores.com. 172800 IN NS west.ns.cloudflare.com.
;; Received 398 bytes from 2001:503:eea3::30#53(g.gtld-servers.net) in 23 ms
I already tried to leave the “Leader” field like ns1.dominios.uol.com.br., but Clouflare refused to accept the domain (couldn’t find the new nameservers).
It doesn’t let me leave one or multiple fields blank, duplicate DNS too.
I searched on the Cloudflare Docs and i found this DNS server:
ns1.external.com
I don’t know if it’ll work, I’m not expert yet with Cloudflare.