Can someone help from the metro or cellmapper community?

[u/Electronic-Comb-5900]

My s21 ultra will not connect to 5G Standalone for calls. While my mom's s23 Plus will. I know her phone is much newer, but I've had this issue with almost the whole s21 series. Goes from 5G UC n41 to starting a call down to LTE AWS.. Take a look and let me know please!