Even if it is added, this data is not really useful. we do not trust coinbase/OKX because they have a headquarters or legal data, but because of their reputation. If these services freeze my account, I can complain here/reddit and you will find the support team forced to respond.
Legal data is useful for those who want to make transactions above 10 bitcoins, and then OTC market offers better options.
As for @The Change Ltd, the service is still new, they can close it at any time, so the reputation effect will not harm the service, then escrow/POR was necessary.
Coinbase is under the authority of some regulation and behind it are certain named persons, who may bear the legal consequences of the wrong way of doing business. Unlike them, @The Change Ltd is just a website and the most drastic measure that can happen is to shut down the site.
btw. this "≈$21K Escrow" can also be removed from the subject, obviously such information will no longer be active.