A few months back, there was some speculation that The Elder Scrolls 6 might not be an eventual Xbox exclusive, despite Microsoft's acquisition of Bethesda. This all came about because Xbox boss Phil Spencer had said that target platforms hadn't been decided yet — but it always felt like his comments were more to do with the game being years away, rather than him hinting at potential plans to allow the RPG on PlayStation platforms.
And if for some reason you were still grasping at straws, know that Microsoft fully intends for The Elder Scrolls 6 to release on Xbox and PC only. That's according to documents from the company's court case against the FTC, which were recently made public. Said document shows a schedule for all of Bethesda's announced titles (both as a publisher and developer), and the entry for The Elder Scrolls 6 clearly states that it's heading to Xbox, PC, and nothing else.