Not getting expected signatures with phpstan

PHPStan is not giving me callable signatures like I would expect. I would expect it to give me the full signature, but it only gives me “callable|null”. Any ideas why this may be?

I have installed the “phpstan support” plugin and confirmed it is working because it suggests an annotation.

I enabled its inspections.

And I confirmed its “Quality Tools” path is empty, like the documentation says.

But then I also can't get things like @psalm-type or @phpstan-type working, so maybe they aren't installed correctly.