This just looks like you’re writing about my son, as he is the exact same! Especially with “Gaggy”🤣 I’m personally not worried too much about his speech just now, sometimes here and there I wonder why he isn’t saying more but he will eventually! If you feel like it’s best to take your son to a speech therapist that’s completely up to you! If you think he will benefit from it then I don’t see why not!
I have 19 months twins and they don’t speak, they babble a lot but they don’t say anything with sense. They try to repeat things but it doesn’t sound even close to what we say. They are also learning two different languages ( Spanish and English) and even if the theory says it doesn’t affect, I think it does. They understand instructions in both languages perfectly. I called the HV a month ago and they told me not to worry at all because every kid is different and until they are 2 or even 2 and half they can take a while to speak properly. Also they mentioned that they cannot refer toddlers to speech therapist until they turn 3 years old. I try not to worry and think that they will speak properly eventually.
I’d wait it out I don’t see any massive red flags from what you have said … I’d reassess around 2-2.5 cause they have massive explosions of language and obviously if that doesn’t happen then you can address it but atm he sounds within range of normal.