Hello everyone! We have a 2.3-year-old boy who still doesn't say any w…

Hello everyone! We have a 2.3-year-old boy who still doesn't say any words and doesn't understand anything, he doesn't even respond to his name, we checked his head six months ago, they said everything is fine, just underdeveloped, so let's talk more and so on. In general, there are no other pathologies, we constantly talk, but we don't want to go to the toilet, what should I do? I'm going crazy ? someone says it's autism because he likes to sit on his phone and be quiet, because of this, he doesn't understand anything at all, there are many kids our age who already play and wave, dance, etc.,