the studies are set in a society in which the main way of existing in society and contributing to it is via employment.

Some generations ago females in this society were regularly without jobs but were "homemakers", in that time if one were not a homemaker and a female how was the person's feeling of well-being?

Reports conflict about that, but in that time of course females were often kept from employment by being homemakers and thus relegated to secondary status.

Perhaps the studies you look for would be related to feelings of social well-being among hunter-gatherer societies, however maybe those studies are not actually needed? Because probably now that the possibility has come up you will realize hunter-gather societies do not have traditional jobs or employment and that people were evidently able to feel happy in those societies.

Now you may respond with examples of how maintaining hunter-gatherer societies would mean death of much of population etc. because the best kind of goalpost moving is the kind that is true. Nonetheless the point should be clear that people can be happy without typical modern jobs and employment.

Whether or not a modern lifestyle and world can be constructed that does not need jobs and still keep people happy is a different question. And there we are back with something for which there are no relevant studies.