Did you even read the article? It says

> To live up to its claim of being a sovereign payment service, Wero intends to reduce its dependence on non-European cloud providers in the future.

They haven't even started any migration, rather future topic without any deadline.

Also the article states that

> When EPI first launched Wero, only cloud services from international providers could deliver the performance, security and stability needed to deliver a competitive solution

and that's is still true to this day, like what EU cloud provider is on the same level as AWS?