If you have not emptied the bin, they should still be there. If not there, then I think they are gone. Unless you go super technical, and go to the sectors of memory. STORAGE, DELETED and REGISTRIES. If you do that, then you MIGHT be able to get the files from DELETED. However, this is an iPhone 6, so you would have to be pretty determined to get those photos. Like you need them to open a safe. Or remember a password.
How to Recover Deleted Photos from iPhone 4S/5/5S/6/6+/6S/6S
To recover deleted photos from iPhone, you can get the help of some data recovery tool to get deleted pictures back on iPhone, like dr.fone iPhone Photo Recovery software.
This problem is easy to solve. I recommend you to use Bitwar iPhone Data Recovery to help you recover your data.
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