My partner just brought a sex doll

There’s nothing much to say and I genuinely support the purchase (he’s had a lot of trauma to that area so struggles to orgasm) but I guess I’m just feeling insecure about the whole thing in a sense of ‘if he could use me why would he want the toy?’ I don’t know, we have a good sex life and he really is good to me I just don’t know how to navigate this

Edit: we are engaged, the trauma in question is repeated and physical from motorbike accidents. I helped him pick out the doll I’m just grabbing confusing feelings afterwards. I see the doll in the same way I’d see any other toy (it is a silicon torso with no face and the ‘bits’ included