20month old and self feeding

Ok i have post it before but turns out still no improvement of him. He is now 20months with 12 teeth and yet still being spoon feed. I have tried spoon feeding and putting his food in his tray in front of him most meals and yet still he doesnt pick up. I think he is reliant of me feeding him. Ive been trying long enough with that method and no luck. I have read here that children wont starve themselves so i guess i need to change my ways. I start tomorrow i put d food in front of him and il leave him to it no spoon feeding this time. Fingers crossed it would work.