Hello, I am a user who is using Krita in Korea. And I am sorry that I do not know English well. This question is generated by rotating the translator and may not feel smooth.
As a matter of fact, so far, only ~.kpp, ~.gbr and bundle files are available as brushes, but do you plan to expand to use Photoshop Brush in the future?

You can already install Photoshop .abr brush files, with some limitations. We do not plan to support other photoshop brush formats. Adobe has not published the specification, so nobody knows how to read those files.