If you are using your own media files, you can find community-made SRT files on these popular repositories:
For the best experience, use official streaming services that provide verified Polish translations. Stargirl(2020)1 DostД™pne napisy
You can access Polish subtitles ("napisy") for the first season of the 2020 TV series DC's Stargirl through major streaming platforms and dedicated community repositories. 📺 Official Streaming with Polish Subtitles If you are using your own media files,
The series is a primary title on HBO Max , where all three seasons typically include localized Polish subtitles and audio options. Stargirl(2020)1 DostД™pne napisy
The most popular dedicated Polish subtitle database. Their desktop client or web search is highly effective for finding "napisy" for western superhero series.