I think the process varies depending on area and agency, I didn’t need to write an account of my life, not did I need to talk in detail about my childhood trauma, which was pretty extensive.
Our social worker wanted to know about my experience of being parented, the impact that had on me, the supports I used to overcome my past and the degree to which I still had work to do. She also wanted to explore the relationship I anticipated my children might have with my parents.
It did bring stuff up for me but, tbh, I’d done a lot of work on myself so was pretty stable and clear about the support I needed. I don’t think it’s an issue that you can’t remember - it’s often the case with trauma of all kinds, adult and childhood that we don’t remember details because of the way we process traumatic experiences. It’s more important that you know your own triggers, that you have a support network and that you’re fairly stable in your day to day life.
I’d also echo that children can really make you revisit your own stuff, so if you have an established therapy relationship before placement that can be a good thing because you’re not needing to go over old ground.
Childhood trauma touches many people, there’s no reason why it should stop you being able to adopt, the chair of my approval panel said that my experiences would make me a stronger parent to traumatised children and far from being a deficit he saw my having overcome trauma as being a significant strength. Try not to worry.