A: Yes. Sony SAB often rotates content. Older episodes may become private or unlisted. Sony LIV is the permanent archive.
The term "UPD" in your search query is ambiguous and likely a typo or a niche tag. taarak mehta ka ooltah chashmah all episodes upd download
Searching for "All Episodes Download" usually leads to piracy sites. Here is the reality of those links: A: Yes