Hey Dreimouse,
Welcome to Apple Support Communities. The information below may help.
If you haven't, start with restarting the iPhone. Restarting has been known to resolve software related issues. For steps on restarting your iPhone, click here: Restart your iPhone.
Since software updates may include bug fixes, we suggest making sure your iPhone is up-to-date. We've provided the steps below and you can also review the steps here: Update your iPhone or iPad. Prior to updating, make sure you have a current backup to ensure your data is safe. The latest software version is iOS 16.6.
1. Back up your device using iCloud or your computer.
2. Plug your device into power and connect to the internet with Wi-Fi.
3. Go to Settings > General, then tap Software Update.
4. If you see more than one software update option available, choose the one that you want to install.
5. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.
Are you actually able to see when the iPhone places the call or does it show up in Recents? If it shows up in Recents, do you have other devices that use the same Apple ID that your phone number could be linked to? If so, make sure the call isn't being placed from that device and showing up in Recents on your iPhone 14.
Are you experiencing other issues such as apps opening on their own as though the display is being touched? If so, this could be related to display itself. Follow the steps here to see if they help: If the screen isn't working on your iPhone or iPad. If it continues to happen, use this link to contact Apple Support.
If the iPhone is only making phone calls and not experiencing any other issues such as apps opening by themselves, we recommend contacting your wireless carrier to ensure it isn't a routing issue.
Take care.