ITV (the broadcaster) has never released full series of the show on Blu-ray or DVD. Instead, episodes are available for streaming on (in the UK) and selected seasons on platforms like Netflix or Amazon Prime Video depending on your region.
For the best quality, streams in HD (though not physical Blu-ray quality). Season 21 featured contestants like Danny Miller, Simon Gregson, and Frankie Bridge, and was won by Danny Miller. i'm a celebrity... get me out of here uk season 21 bluray
There is currently of I’m a Celebrity… Get Me Out of Here! UK Season 21 (2021). ITV (the broadcaster) has never released full series
If you’re looking for physical media, you may occasionally find unofficial or region-specific compilation DVDs (e.g., “Best Moments”), but not a complete season 21 Blu-ray. and Frankie Bridge