First of all, there is NONE black list in the EU, the wording is rather
"On 18 February 2020, the EU revised its list of non-cooperative jurisdictions for tax purposes."
In other words, a list of non-cooperative countries as defined by the EU for tax-damaging forms of business.
From a founder's point of view, this is rather a big advantage, as it implies that Seychelles does not give in and provides information on offshore IBC formations to the EU and its member states.
For the Seychelles it is also rather unlikely to agree to the EU requirements, or the exchange of information to be EU compliant.
It is important to note that the Constitution of Seychelles provides for the right not to provide data and information to third parties.
According to the "Las Vegas motto", what is in the Seychelles stays in the Seychelles.
It is therefore forbidden, by law and under penalty of punishment, to transmit data to third parties.
The only possibility, for which the Seychelles have also agreed, is the disclosure of data, if the crimes are real, major crimes, explicitly, - terrorist financing, arms trafficking, drugs. So if money laundering is used to try to do these things.