Concern about 18 month

Doesn't sound like speech delay since he is saying words. Could be something like a regression instead. He is still little and maybe school is just a bit overwhelming just now so he needs time to adjust and get comfortable.

thanks 😊 Today he did end up saying some words at school like “No” and doing the motions of wheels on the bus

Mine too but she started last week apparently to be comfortable.
She is now 23 months. Took her time lmao

How many words is she saying ? I’m just worried he’s been home with me since day one

They always give feedback that she was always quiet, plays without showing joy on her face lol. Doesn't talk at all. This was February this year, she was 17 months. 3 months later, they said she started babbling and showing happiness when playing, and can allow other kids plays with her or come near her.
Just last week or so, they say she started saying words, mind you, she does all the above at home.
So its a matter of them getting comfortable and knowing that they're finally in a safe place with people that care.

Not sure how many words, but she says, ok, you okay?, ball, goal, eat, sea, mama, daddy, baby, go, what's wrong?, up, and some others in my language and English but I cannot seem to understand yet as they sound like babbling to me lol.
She makes animal sounds when we are singing old mcdonald has a farm, like quack quack, neigh neigh, oink oink, baa baa, and EIEIO, that's about it.
Some actions to a LOT of nursery rhymes and sign some stuff. This was from 1 month ago when we started Ms Rachel.

Mind you, as of 1 month ago, she couldn't do any.
I nearly asked for referral to get her looked at lol.
Didn't know the girl is just an observer and takes her time. Took her time to crawl aswell. And then once ready, you can barely see her back!

Just a matter of getting comfortable 😊 honestly, once he gets used to it all you will see a completely different kiddo. They all do things in their own time