Galaxy S23 ultra not receiving certin text messages

Hello all, my girlfriend recently ported a number in from verizon. She got a galaxy s23 ultra. The problem we are having is she isn't able to receive text messages from Snapchat, Facebook and many others to verify her account. She is receiving texts from personal phone numbers (all carriers and iOS and android are working fine). We have double checked the phone number and it is correct. We also tried factory resting the phone and not doing any kind of transfer, we have tried different default messaging apps, we tried restarting the device multiple times, checked spam and made sure no numbers were blocked, we made sure all permissions were enabled, also tried uninstalling the apps and then reinstalling them, also checked to make sure no spam calls and texts were blocked on the spam app. And lastly we were able to send an a verification from her Snapchat to my number so it doesn't seem to be an app problem. Any fixes or suggestions? Many thanks!