> Meanwhile an account I created for a new product

Meta requires the main account to be created for a person, not a product, business, or non-human entity. That's why you got hit with the "Please confirm you are a human" confirmation and then the account was locked for violating community standards, which require primary accounts to be people.

The community standards page in the links they sent you are pretty dense and it's easy to think you're not violating anything if you're not posting adult content and the other obvious categories. This is the section you violated:

> Create an account that represents a non-human entity, such as a business, pet, or fictional character

You have to follow the steps to set up a business page from your personal account. Sorry you didn't know this before going through the process, but it's important to read the proper channels for setting up business pages on all of the social media platforms these days. They're all dealing with an onslaught of spam and scam pages and they're under a lot of pressure to keep them out.