If you are looking for external English subtitle files (.srt) for this episode, they are commonly available on major repository sites:
: Sites like OpenSubtitles and Subdl host various versions, including the ION10 and WEB releases. Stranger Things subtitles English S04E01
The Season 4 premiere introduced fans to "descriptive captioning" that went beyond standard sound cues. These specific descriptors became a hallmark of the season's viewing experience: If you are looking for external English subtitle files (
‘Stranger Things’ Subtitle Linguists Explain Season 4 Captions - Netflix Stranger Things subtitles English S04E01