Can social anxiety start late?

Hi I am new to this forum and would like to begin to know more about myself and why I am socially anxious.
This is my childhood. All this was relayed to me. had a neglectful mom whom I lived with till the age of 2 or 3, my father was absent mostly. They fought all the time.
Then I was forcibly removed from my mum by my dad and brought to live with my grandparents in another country. My dad lived with me for a brief period of time. My dad is a narcissist but he treated me nice till I was around 13 then he got emotionally neglectful and abusive. He would say things like, you are a embarrassment to me, or sneer at me for trying something new and saying I am not any good at it.
I remembered I was a confident child and in early teens who likes to make friends and talk back to teachers. But also remember being very socially withdrawn and unable to have eye contact in my teens, especially after my dad became emotionally abusive.
I am wondering is it possible for social anxiety to start like at 15 or is it something that starts earlier? thanks