According to a report  by the the Consultative Committee  of the Council of Europe, the committee is working on “Inter-state exchanges of data for Anti-Money Laundering/Countering Financing of Terrorism, and tax purposes” (item 9).
The Bureau took note of the information provided by the rapporteur and the secretariat on the latest draft document, held an exchange of views, and instructed the Secretariat, under the guidance of the rapporteur, to gather further written comments on the text for discussion at the forthcoming plenary with a view to finalising it in 2023.
Of the four documents that is referred to, I only found one, ‘T-PD(2021)4rev’. It is a report on the implications for data protection of mechanisms for inter-state exchanges of data for AML/CFT and tax purposes that was written by Eleni Kosta of Tilburg University .
 Report of 22 September 2022.
 The Consultative committee of the convention for the protection of individuals with regard to automatic processing of personal data, homepage. Their newest work program is here.
 Report of 30 July 2021 on the implications for data protection of mechanisms for inter-state exchanges of data for Anti-Money Laundering/Countering/Financial of Terrorism, and tax purposes.