Internet and wi-fi problems

Internet and Wi-Fi don't work on my iPhone 13 Pro. I've tried resetting network settings and my phone overall. I've also tried removing and reinserting the SIM card, but the problem persists after two days. I can share my internet connection to other phones, and it seems to work fine. However, even though my network shows 4G, apps that require internet aren't loading. What could be the issue with the phone? Any advice would be greatly appreciated.