Spoken like someone who's never been in therapy or studied psychology, people bet and guess and infer stuff all the time; it's a "soft" science for a reason.
That means no baby pictures at all.
Specifically pictures of their genitals, I feel like no baby genital pics is a good default, yes, what a weird hill to die on.
You have no evidence of this trauma.
Absence of evidence is not evidence of absence
You're just guessing.
Guessing, inferring, surmising, call it whatever helps you sleep at night. I think of it as erring on the side of safety and respect for my kids. Not having pics of their junk doesn't make my life any worse, there's only downsides for them.