> So-called source available software is a software for which its source code is made publicly available for access. It might or might not be legal to share or modify the software or its source code.
(from https://en.wikipedia.org/wiki/Source-available)
See https://github.com/FakeFishGames/Barotrauma for an example of such a project
'Open source' has a commonly agreed upon meaning, 'source available' has a meaning. You are mistaking open source for just source available.
> So-called source available software is a software for which its source code is made publicly available for access. It might or might not be legal to share or modify the software or its source code.
(from https://en.wikipedia.org/wiki/Source-available)
See https://github.com/FakeFishGames/Barotrauma for an example of such a project