This is a tricky topic because there is SO much variation in those early years. Many speech-language pathologists can’t even agree on when a child is developing typically or if their articulation acquisition is behind. Sometimes it is more complicated than just not being able to make certain sounds.
The best advice I can give is, if you are concerned, it doesn’t hurt to ask. Reach out to a Speech-Language Pathologist or local early intervention program. It can’t hurt to have your child’s speech assessed but it CAN hurt if you don’t and there really is a delay.
Delays in speech development can impact social emotional development, cognitive development, reading skills, and more later down the road!