Yes. And “partial severing” is probably even more common. E.g. the emotional support stops. Certain topics are avoided, severing any chance of your parents getting to know who you are as an adult. But still expecting full normative presentation at family events etc.
I said this elsewhere, but I absolutely am convinced that straight people genuinely have no concept of how common coming out leads to complete severing of a child from a parent's support, especially when they are a dependent (homeless high school, no college assistance, etc). It happens -often-.