Love and second this response.

If it were me, I would start by sending the text/email first thing in the morning asking for more info about the "many" experts that offered this advice. Not in a confrontational approach, but more specifically that you want to support what your kids need and that's hard to understand with limited information. That it's important to you for your children to be supported but it's unclear how to approach your role in doing that.

I'd be wiling to put money on there being pushback from your ex here. Think big picture in how you respond- your allegiance is with your kiddos and their needs, don't get caught in a back and forth about doubting what they are telling you. This almost feels like a bait to get a reaction out of you, when in reality (recommended or not) there's not much you can do about pictures being taken.

As far as medical records for your kids, does your order still allow you access to all records? For your exs stance to hold merit, the opinions would need to be from experts who know and have properly evaluated your kids. I HIGHLY doubt they have been evaluated by "many". For all you know, the "many experts and counselors" could be people from the next pool table at the bar.

Say this turns into a lengthy ordeal and no names are given, consult with a professional who knows your kids for input, like their ped. Request a recommendation from the doctor for someone they feel could give you a more comprehensive idea of how to support your children. Then you can send the names to your ex with any input you are given and begin the very long process of docunenting to regain your footing here.

My heart goes out to you. There's not a whole lot of comfort in saying "one day they'll know" when that day is torturously at a distance. Throw your focus into strong and steady support of your babies and create meaningful face-to-face moments, like inventing a secret handshake with each of them and then for all 3 of you. Best to you.