When will Sophos Firewall support Intel i226-V 2.5G

Currently not planned to include this due the prioritization of other important items. 

I can only recommend to use a hypervisor in-between, as they will work without much of a downsize and gives you even the option to host a smaller linux on it in parallel. 

For example: https://www.youtube.com/watch?v=7pvgKc3WdEg&pp=ygUOUHJveG1veCBzb3Bob3M%3D 

And here. https://youtu.be/nwlircveTHU