install? NextDNS service?

[Ceyarrecks]

Excuse me Please:

Is there a way to, beyond just inputting NextDNS' dns servers, actually install the service into the 26.1.6 OPNsense os?

NextDNS does include instructions for installing on a 'FreeBSD' os,
https://github.com/nextdns/nextdns/wiki/FreeBSD

 which i realize OPNsense is based on;

However, as I would choose not to take anything for granted, what would, or, can there, be a means of installing the Account-specified service?