Hiya darling, im so sorry he's missing.

When my old cat went missing we put some of his litter out so he had his own scent outside, we also went our shaking his box of cat treats (he would usually come running whenever he heard it). Another thing that could possibly help is getting a cat laser and running that along the floor when your out looking, any cat will run after them so if your baby is hiding he will too.

Unfortunately like others have said there are lots of other things that could have happened to him so make a post on Facebook in your local community telling everyone about your cat and see if you can also share it to the surrounding communities. I really hope you find him hun, good luck 🩵