This VSCode extension eases switching between related files with the single press of a button. You can cycle through related files with F4 or Shift + F4 for going backwards. It attempts to fetch next corresponding file in a rotation. First it checks current directory and afterwards it scans the whole workspace.
The extension has a degree of customization available, for example files, or whole directories, can be put into blacklists.
Default rotations support Typescript, Javascript, C and C++ languages (for example rotating between header and source in C/C++)