Thank you so much for your reply @Landladymews2 (this is @SausageSpoon with a name change).
Like I said my little boy is very much like yours at 19 months he understands a few commands but can't identify body parts, animals, food and is hit and miss with familiar items.
He says a few words (I think, though I often wonder if it's wishful thinking and I'm hearing word because I want to). He says mama and dada all the time but I don't believe it's functional. DH disagrees. My husband thinks there's nothing wrong and doesn't want to hear about my worries.
In terms of pointing he does do it but its rare, not even once a day. Maybe every few days? Both to request and show. He does other gestures (claps, waves, blows kisses, high fives) but very inconsistently. He gives joint attention in other ways by showing and social referencing.
My pediatrician gave me the usual they get their in their own time so I booked a private speech therapist. She wasn't worried and said there wasn't much she could do at this age. I've also had his hearing checked and that was fine.
I adore my little boy and feel quite alone and unsupported in trying to help him.