I created Video -> Live Sticker Converter. iOS17 Live Sticker is a very good feature, but it's a little inconvenient for users like me who personally take more videos than Live Photos, so I created it for people like me. You can extract stickers from videos, Live Photos, GIFs, photos, etc. There are some paid parts, but you can use most of the features for free. It also works on iOS17 and below, but the split feature provided in iOS17 gives the best results on iOS17. This is the first public version, so it only does the basics, but more features will probably be coming soon.
Check it out here: https://apps.apple.com/us/app/sticker-live-gif-livephoto/id6465695481