Just for some additional clarity (thanks @bitflip), the changes here have been made to the US tax code. The knock on effect is that it means that non-US citizens are required to pay a 10% withholding tax on all disposals and distributions received.
The way that this is being implemented and how these taxes need to be reported means that most non-US brokerages will be unable to offer these types of stocks.
I’ve noted some others already sending similar communications to their customers.
I appreciate this isn’t an ideal situation, but we’re really not able to do much in the circumstances.