factory data reset your phone and get fresh start by selecting specific countryvarient may be same as per it Manufactured

You can download official Samsung Dialler APK of different region from third party website and install it.

S8 and Note 8 family will not have an official android 10 version according to their software updates routine for galaxy devices .

There is no official beta support for Samsung A70.Its all tuned version of ONE UI 2.0 beta of S10 .Recommended to wait for OTA of One UI 2 for A70.

7th Beta is still rolling out for devices . (For Bug fixes)soon official firmware will rollout by OTA for S10 & Note 10 family .Beta for S9 & Note 9 series will roll out selected regions soon.( probably 5 beta )