Yeah, you can definitely grow those seeds. They’ll probably be fine. But here’s what happened your feminized seed threw nanners (male flowers) or got pollinated somehow stress, humidity spike, or just bad genetics luck. It happens, especially with some strains. The seeds you found are likely female (since it was a feminized plant), so they should grow out female too. No risk there. But before you pop them, think about what might have caused the pollination was there stress during flower? Temp swings? Light leak? If you can figure it out, you can avoid it next time.
7oz is still solid, so your grow went pretty well overall. Just keep those seeds dry and cool until you’re ready to use them. They’ll be good for a while. Next run, just dial in your environment a bit tighter if you can stable temps, no light leaks, solid humidity control. That usually stops the nanners from showing up.
The seeds are a bonus, not a disaster.