I am worried because my 20-month-old baby's development is slow ㅠ

‌Born in January 2025, my baby has just turned 20 months old.
He is a boy, 83cm tall.
His height is in the bottom 15th percentile,
but his weight is in the top 90th percentile.
He loves eating very much,
eats well, poops well, and plays well.
He has good motor skills, but
his height is on the shorter side compared to his peers.
(To be honest, I am not too worried about his height. If he is small, he can just live as he is.)
However, his speech is a bit delayed ㅠㅠ
His receptive language is good,
so he follows instructions well, understands almost everything said to him,
and has an excellent memory.
If I give him trash and tell him to throw it away, he does it.
We have hundreds of books at home ;; if I ask him to bring a certain book, he brings it.
His receptive language and memory are great.
But he refuses to mimic speech;
if I tell him to repeat after me, he gets angry ㅠ
The words he can say are
only about 10 words, such as "Mommy," "Daddy," "Ouch," "Yes," "Persimmon," etc.
I heard that at this age, children can usually start combining words.
Should I take him to a developmental center?