The perplexing conundrum of healing from infantile trauma

So I've been reading a book on trauma (the body keeps the score) and while I've yet to finish it, it very often brings up the connection between trauma and memory.

But it hasn't (or at least yet) ever talked about a traumatic experience happening long before a human starts recording memory.

It seems to say that, or at least what I'm getting from it, is that you need to be able to recall what happened to you in memory to fully process it. (I could be wrong here full disclosure)

How exactly do you recall or process something you can't remember in memory?

Its basically amnesia for a lot of us and I dont see there being an actual way for this trauma to be realized and re-experienced like that. It makes me wonder If i need to like, fabricate memories in order to heal from them?

Then again maybe becoming aware of the physical pain I was in resulting from the trauma was like my invisible memory coming back, the body's memory as you could say?

Would you even need the mental memory of it happening then?

I really dont know, I'm wondering what other people's ideas and experiences are with this.