As an Indian I can relate to what you are saying. My parents didn’t expect that daily call. It was a weekly call on a Sunday which was to check in if everything was ok. I do have friends who love speaking to their mothers every day.
Having sent a kid away I could offer a different perspective and this may not be the case for you. As parents we end up being consumed by taking care of children that once the leave, many parents do not know how to fill the void in time that has been created with the child leaving. They have all this free time now and don’t have other activities or socializing to do that they constantly think about what you are doing while you are away. They become anxious and find a reason to worry. I sure hope it’s not the mistrust. Perhaps, you can reduce the frequency of the calls so that you look forward to speaking to your mom. It should come from a place of love for both.