The market for full suspension or front suspension only on gravel bikes is real small.

Nex time you enter a gravel race or group gravel ride with friends take note of how many gravel bikes with any suspension are in the group. I'm betting it's few to none.

I ride gravel with friends often and have entered gravel races with a few hundred participants....No gravel bikes with suspension to be seen anywhere. While that's anectodal and in my area...I'm pretty certain that's the same scenerio across the country.