I have a "gravel" bike which I use a lot at the moment (probably 100-150 miles a week or so), but I seem to be going through rear tyres at a decent rate. The 2 photos below are of my 2 recent rear tyres: an 8 month old Schwalbe G-One and a 6 month old Hutchinson Overide. They're both 35mm, tubeless, usually at about 40psi (within the recommended range on both), and do about 30/70 on/off road. Off road is rarely anything more than gravel fire roads and canal towpaths. Due to having TRP Spyre mechanical brakes I can't even use the excuse of locking the rear wheel - these brakes are rubbish and I'm not able to get enough braking power to do that, so the wear patches are not due to skidding.
I'm quite surprised at the lack of life these things are offering. They both market themselves as "gravel" tyres but it can't just be the tarmac bits that's eating them up. And anyway, it's pretty much impossible not to ride on tarmac at least some of the time; unless you live in the middle of Kansas there's a lot of it about. Anyone else had similar experience? The 3rd tyre I've just put on is a Panaracer GravelKingSK, so we'll see how that fairs.
Before the label "gravel bikes" became popular these bikes were called "adventure road", and you'd hope that the tyres developed for them would be able to handle both...