The specific content of "Unseen Bits #3" varies by season, as it covers the events of the of the show. Here is how you can find the guide for the specific version you are looking for:
"Love Island" S5 - The Unseen Bits 3 (TV Episode 2019) - IMDb 20. Unseen Bits #3
You can find these episodes on the ITVX official Love Island page in the UK or on Hulu in the US (often listed under the main season's episode list). The specific content of "Unseen Bits #3" varies
Sites like The Movie Database (TMDB) and IMDb provide brief synopses of what occurs in each "Unseen Bits" installment. 20. Unseen Bits #3