As another user already said, this remaster is being done by an outside studio, so it shouldn’t be significantly affecting any ongoing work at Bethesda.

While Todd Howard is full of shit half the time, I do believe him when he talks about their development roadmap. When Elder Scrolls 6 was announced, it was under the disclaimer that it was not an active project for the team at the time, and would not enter full production until Starfield was done. Starfield released in fall of 2023, so Elder Scrolls 6 should have been in full development for about a year and a half now.