Unfortunately, it doesn't look like Brock Bowers will be playing in Week 2. He underwent a meniscus trim surgery on Tuesday, Sept 9, with the Raiders saying he'd miss "a game or two" — and the expectation around the industry is that'll be about two weeks (from the Brock Bowers page). That means he sat out Week 1 and is likely out again in Week 2.
The Fantasy Headliners confirmed this timeline: "Brock Bowers is expected to miss two weeks" — .
So you're looking at a potential Week 3 return at the earliest. In the meantime, Michael Mayer steps in as the Raiders' primary tight end (from the Brock Bowers page).