My DS was the same, started speech therapy privately about 2 and a half (weekly for an hour for 8 months.)
Attention span very short, not even good with watching Tv, couldn't watch a movie. Slowly improved due to therapy, taking turn games, is playing together with me narrating and me talking simply to him, repeating, repeating, boring myself repeating again 😁Leaving some looooooong gaps for him to reply, even if he didn't.
It's weird after 997 times of saying look duck when passing the pond by our house, one day he says duck and points. It all goes in. One thing I would say is there is advice to say don't pressurise kids to talk, but I don't think this helps long term. Giving them options can, but it's so easy to still point( DS points to cupboard, I say "you want biscuit" ( simple sentence) I open cupboard and bring out two things. I say raisins or biscuit ( labelling items) He points .. but after a while I did say can you try to say and he tried. We had to break the pointing. When he stated to use words they weren't correct but he maybe got part of it.
Attention span here still bad and is off to school in September (age 4) Will be interesting to see what they say. Speech I'd say is 80% there now. Amazingly how it comes. There wasn't an overnight moment. It was very very slow. Confidence is the main issue now.
Plus if they are watching tv or iPad make sure it's something with vocabulary. Mr Tumbke is fine, if they are interested. There was a good short programme on words and language expansion on CBeebies Yakka Dee. So one word per programme e.g Egg but expanded big egg, white egg. But stuff like Paw patrol is fine there is dialogue that captures their imagination, those weird you tube videos with just music have no language to listen to.
Sorry I name change a lot, so if this sounds familiar from a past thread then yes it's me again.