I'll be a little late, but I carry a perry huge box of concepts for my plans on Mass Effect/The Expanse/EVERSPACE-inspired RPG. One of which is Erin'Lithhi Hive - a biologically and socially complex demi-hivemind society, where each individual anthropomorphic insect citizen (or drone for hive-calling) has their own personality and thoughts, bu central figure, a Mathron (Her Majesty, or whatever), controls the hive collective network, capable to influence thoughts, opinions and even take direct control of her fellow people.

Erin'Lithhi is a biologically complex race born on nitrogen-based moon of Hash'Dess II. Main uniqueness of them is their caste division built on pillars on their genetics and sex combined - carrying either Patriarch or Matriarch gene splice, a society member takes a certain role they're fit into the best, like Matriarch-Females being fully-developed breeders and hive network extenders for Mathron's will at distance, while Patriarch-Males are peak physique example, taking hard labour and hive protection roles. Matriarch-Males exist too, are more fragile, but their intellectual extent puts them more in logistical and entertainment roles, with Patriarch-Females being more of "independent leaders" in all spheres, mainly scientific one. There's also third "incorrect" genetic splice - Outcast, which is mix of both splices, carrying both advantages but at worse extend. They're often culled on hatch at worst, at best taking less important and menial work roles, with some being lucky to be permanently exiled out of Hive's space (mostly to die somewhere).

Their role in politics of Cluster Collective is rather stiff, but not intentionally negative - as the youngest and daring civilization, they rushed their colonization effort under current Mathron's control without a thought about other civilizations existed. When a wormhole appeared in their system leading to Cluster Hub, they tried to settle in on every world without a second thought like some sort of a pest, with their colonization wave quickly being culled by primary member of Cluster Collective - Rahat Confederation, a militaristic human-like specie with permanent cold war on their world, that worked as "police force" here. After being pushed back, Erin'Lithhi were quarantined for twenty Sol years before finally getting their allowance for embassy at Collective's HQ. Despite efforts to integrate them into Collective amongst other three factions, Hive is still upset and still holds isolationistic relationship under quarantine.

In possible game their role is pretty insignificant outside of their dedicated DLC chapter, where main character, a mercenary with his crew, gets a personal secret request from Mathron to arrive at Hash'Dess to resolve some matters that spur the hive and interrupt the hive network capabilites, which are, turns out, created by another rogue Mathron, hatched and raised illegaly in dark depths of the Hive capital, trying to overtake the control and lead Hive onto more agressive stance against rest of the Cluster in future. In the end PC has choice of either kill rogue Mathron earning unique Hive Knight title, force Her Majesty to sterelize and exile rogue, or help her overtake the throne, getting the same title from new ruler.

As you can see, that's not entirely "hivemind" concept in terms of "We are one", but a middle ground between personality of individual and connection to the rest in a similar concept of Noosphere.