I’d check it wasn’t sag as above before doing anything drastic.
I’ve heard stuff about last years’ Foxes being tweaked by Fox to show full available travel somehow but destroying the ride in the process which may distort perception a little.
I’d expect a working fork to show less stanchion that it’s nominal travel with a rider on top though, and especially when riding. You can also expect additional compression under braking, which should return once at rest.
The classic 32 problem (which I think is what Martyn’s heading toward above) is the bushes in the lowers that the stanchions pass through. These can loosen with age causing the stanchion to feel less located and allowing forward/backward movement under rocking. They’re a fork in bits job and probably want a workshop to do properly although I believe they can be diy’d.
If the fork doesn’t wobble, has no cracks, shows full travel when at rest, holds air and has been serviced I wouldn’t worry too much… 🙂