VoLTE provider support

Hi! Is there any way for me to fix VoLTE on Xperia 10 III (if it currently doesn’t work with my provider) besides changing provider?
I make a lot of calls and in the past half a year or so it has gotten really frustrating because every few minutes, I can’t hear my partner and vice-versa or the call drops directly. This happens everytime, independet of my location.
This really frustrates me, so I wonder if there is a way to manually get it to work?