According to Git for Visual Studio 2019,
“The new Git experience is the default version control system in Visual Studio 2019 from version 16.8 onwards. However, if you want to turn it off, you can. Go to Tools > Options > Environment > Preview Features and then toggle the New Git user experience checkbox, which will switch you back to Team Explorer for Git.”
According to Git for Visual Studio 2022,
For Visual Studio 2022, the new Git Experience is the only Git experience. Unfortunately, there is no way to revert back to the old Git experience.