Files Retrieval

Hello, so my old iPhone 8 Plus (iOS 15.6) has been in the recovery mode for a year now approximately. The cause of which I forgot my phone passcode and I tested my luck until it reached to that state. Currently, it's only displaying the wrong time, 'iPhone Unavailable', and Emergency. There isn't an option of which to factory reset the phone at all. There is no SIM card installed and the wifi settings had been reset so it won't be connecting to one anytime soon. I've tried plugging it to my computer but it doesn't prompt the 'Trust' at all. My biggest priority however is to retrieve my photos that is in my phone right now. The photos in this old phone of mine is not backed up and I want to know if it's possible to retrieve them. I didn't want to go straight to a nearby Service Provider if there is an alternative here I can do it at home.