Most people cannot answer that. It is not a failure of yours. It is how the last three years were sold: pick a model, ship a feature, deal with the rest later.
The rest is now.
A Forward Deployed Engineer responds within 48 hours, reading what you wrote. Nothing else happens to your message in the meantime.
A Forward Deployed Engineer responds within 48 hours. Not a sales representative. Not a discovery call. An engineer who has done this before, reading what you wrote.
If nobody has ever asked where your AI runs or why it decided that, buy from the hyperscaler. It is cheaper and it will hold.
If your demos work and the security review is where they die, you are in the right place. Same if the ones that survive never leave the team that built them.