Why are not all parts available?

So, whats the deal here, front module not available, (out of stock) “power button module” not available… Thats not what i had in mind when i bought a FP3 3.5 years ago. Now the power button flex pcb is defect, and i can’t buy a new “button module”. Buttons should have been replaceable easily. So not sure if i go for FP again.