Does the oversoul of the honeybees have free will and free agency? If not, perhaps to what extent might that lack contribute to individual honeybees’ high level of satisfaction with their lives?

The questioner is assuming that free will is a liability. It is certainly a challenge and a struggle for humans to manage, but keep in mind other species are of no concern to the interlopers. They are focused on the level of humans themselves. The dark spirit meddlers need human-level energy for their survival and get only a meager support of energy from lesser species so there is no value to them in carrying out attachments and a further manipulation. The energies carried by most life forms are not a good match to the dark ones because they are in such good alignment so it is a waste of their efforts to bother with other life forms and certainly something like insects, being minuscule in terms of body size and level of energy present. The oversoul is a consciousness residing within the divine realm, so it is not subject to the distortions of the human plane, the physical level of existence, as is the case in what humans experience during their lives and, for the most part, animals are able to thrive just fine if they are not interfered with by human activities that are often ill-considered, harsh, disrespectful, and sometimes quite devastating when there is damage to the ecosystem as well as personal harm that might result from an arbitrary act of violence done for sporting purposes, for example. So honeybees are well served by their oversoul to keep them in alignment and in harmony with one another. How they are treated by humans is another matter and cannot be governed by the oversoul directly, but a certain degree of assistance will always be offered from the divine realm to help any creatures in danger in the environment, including when there is a human act of negligence underway damaging things.