Luke & Tom: unless the rear facing itself is broken, there is no need to dissemble the phone. If it is only the lens, replacement lens kits are available on Amazon and, much more cost effective, eBay - along with tempered glass lens protectors: you can peel the affected lenses from the housing; just be cautious if you are using heat to soften the adhesive - the camera sensors are very sensitive and are easily damaged - and be sure to dislodge all glass fragments (tip the phone upside down and tap lightly; a little compressed air won't harm either). Hope this helps.
iPhone 13 Pro 后置摄像头更换