You can pair an iPhone to a Windows 11 PC with Bluetooth, but Bluetooth on iPhone does not allow file browsing or file transfer. Apple blocks that capability.
You would need to go through USB cord connection instead, and need to download iTunes in order to access photos.
Download and install iTunes, log into your Apple account in the app.
On the phone, make sure you unlock. When prompted, Tap Trust This Computer and enter your passcode
On the computer, go to File Explorer, go to This PC >Apple iPhone > Internal Storage > DCIM