Yeah, that’s definitely a male. You can see the characteristic pollen sacs (those round/oval structures on the nodes) with no white pistils classic male structure. Good catch early, and smart move isolating him to the balcony before he drops pollen everywhere.
Pollen collection is solid strategy. If you want to keep him isolated and collect pollen, here’s the simple route: Put a small bag over the branches as the flowers mature (they’ll open in 1–2 weeks). Tap gently and collect the pollen on paper or in a container. Store it in a cool, dry place (fridge works fine it keeps for months in a sealed container). Then you can feminize some seeds from your females next season.But real talk: If this was supposed to be feminized seeds, something went wrong with the breeder or storage. Feminized seeds occasionally throw males (stress, genetics), but it’s rare. Might be worth checking with the seed company if you want. Either way, you’ve got two paths: collect pollen for breeding, or just remove him completely. Up to you. The plant itself is healthy just male.