VS 2017 has been out of mainstream support since 2022. There are no updates being made to it. The option is still there in all versions of VS.
I'm not aware of a single case where the option would not be available in Solution Explorer. However you can get to it without using the context menu. The hotkey is Alt+Enter
. Select the file and use the hotkey to open it. Alternatively it is also tied to F4
. Press that key and the window will pop up. Then select the file in Solution Explorer.