The ArsTechnica article discusses that.

> In fact, there was some controversy over the first attempts to do so, with an early paper having been retracted after a reanalysis of its data showed that the evidence was weaker than had initially been presented. A key focus of the new Nature paper is providing more evidence that Majorana zero modes really exist in this system.

https://arstechnica.com/science/2025/02/microsoft-builds-its...