NEWS: Credit Suisse targets IAG in $3b Greensill insurance fight

https://www.copyright link/companies/financial-services/iag-targeted-in-3b-insurance-fight-after-greensill-collapse-20230127-p5cfw9

Seems like this number keeps growing. I feel I may have missed something in a report, but I do recall back in March 21 it seemed like there was minimal risk because either:
a) IAG sold BCC before the policies in question were written, and the exposure is with Tokio Marine, or
b) There is a reinsurance agreement in place which creates the lack of net insurance exposure to Greensills.
(9 March 2021 announcement).

As IAG are named as a defendant in the case, it is making me question reason a). https://www.comcourts.gov.au/file/Federal/P/NSD110/2022/actions

As for reason b) has there been any disclosure of who IAG has reinsurance agreements with for this exposure, and how much for?

TIA.