Realme 10 Mobile Data Problem Occured After Android 13 Update

I recently purchased a Realme 10 device and have been facing issues with mobile data usage dropping since the Android 13 update. This is impacting both my internet usage and work. As it's my first time using the Realme brand, I've been unable to find a solution to the problem. I've already reset my network settings and attempted some technical tests, but the issue persists. Any suggestions on how to resolve this problem would be greatly appreciated.