The testers have the latest build, and have not reported any bugs. I don't even know if the project I am working on is even going to be funded after a few more months. I am just in this sort of limbo that really sucks.

I would try to learn some new tech. Definitely not something you can do in a vacuum with no goal for months in a corporate setting, but e.g. learning more about a programming language you already use, or some libraries, some tooling, you can easily spend a few weeks.

After that, yes it'd make sense to find something else.