FWIW, I live in a semi-rural area almost on top of the Pennine hills with an open aspect, in the NW of England & my FTTC connection has been hit by lightning twice since 2011.
However, most of the cabling from the cabinet is below ground, leaving around 40m or so exposed to the elements.
Each time, the damage was only to the ssfp.
I originally had a Mk1 faceplate which was replaced with another Mk 1.
The second time, the Mk1 faceplate was replaced with a Mk2.
On both occasions, there was no damage whatsoever to the HG612 modem, the router or anything else.