I can't use HTTPS on my OpenWRT router with SmartDNS

SmartDNS allows you to configure upstream DNS servers, but this only worked for me once with NextDNS; it no longer works. Upstream DNS servers like https://dns.google/dns-query or https://cloudflare-dns.com/dns-query work correctly and perfectly. Please help me, as I don't want to use the NextDNS package directly in OpenWRT.