Sounds more like a planning requirement, and in-flight up to the operators what to do. It would be more so an issue of whether you push back for departure without said RFF capability than whether you continue an approach. Maybe a crew could then assess they may not have full RFF accessibility may mean you evacuate earlier in certain circumstances rather than rely on fire services being able to extinguish the fire. After all if you land away from intended destination whilst on fire you take what external help you can, but you would most likely get everyone off ASAP rather than wait for help to arrive.
What if two A380s collide on taxi and catch fire, then that obviously exceeds the RFF capability. (I sincerely hope I just didn't make one of those airport risk assessors head explode with worry now)