If you use Cloudflare als your dns (you can transfer your existing domain) you can setup a cronjob that basically functions as a dynamic DNS. Then you only need to run this cronjob inside your home network. It’s free if you already have a domain and something that runs 24/7 inside your home network

Also, as read in the manual. The Max power available through SFP+ port is 1W. I want to use a module to RJ45. ServeTheHome here has a chart that shows that these modules use 3 watt. So is this card even possible to use with RJ45 modules?