I was told that all USS 'signposting' was removed from the Tesla UK website in April 2022 by Tesla Customer Abuse.Im not even convienced it'll come soon as I'm guessing they might not have been working on it upfront. Possible they had USS shipment issues then decided they might be able to do it with cameras so went that route.
From this, I infer that they (should have) started working on the Vision based solutions ~10 months ago.