Is twilight domain cleric’s unlimited darkvision balanced?

There’s Unearthed Arcana Twilight Domain Cleric subclass presented at (08/2020). It has feature

Eyes of Night
1st-level Twilight Domain feature

Your eyes are blessed, allowing you to see through the deepest gloom. You have darkvision with no maximum range; […]

As an action, you can magically give the benefit of this feature to any number of creatures you can see within 10 feet of you. The shared benefit lasts for 10 minutes. You can extend this benefit a number of times equal to your Wisdom modifier (a minimum of once), and you regain all expended uses when you finish a long rest.

Considering how the "normal" superior darkvision is only 120′, unlimited range seems very powerful, even abusable. For example long bow range is 150/600. This immediately opens up a bunch of very powerful tactics even by a single crafty player. And then extending it for up to 20 other PC’s and NPC’s, for up to 5 times, essentially creating an archer force with the benefit of Greater Invisibility. It’s situational, but the situation happens every night…

The question: Is this feature unbalanced, especially when considered in the context of a higher level character taking 1 level multiclassing dip, being able to give both a solo advantage with no limits, and unparalleled option to buff allies all the way to highest levels of play?

  • If it is unbalanced, would reducing range to 120′ be enough to make it balanced, yet not worthless, or should range be even less?
  • If this feature is balanced as is, how so? For example, are there already options to achieve similar levels of power with similar opportunity cost?

Background for the question: The subclass is given at a sort-of official resource (DnDBeyond). So even if it is presented as play test material, I feel it has more legitimacy than most Unearthed Arcana material, which is why I am asking for… support on the idea that it should be nerfed before allowing it in a table, or arguments that it’s actually not a problem. I’m not asking for alternative ideas on how to nerf it, other than what is written above about the range.

The campaign settings that concern me are fantasy settings like Forgotten Realms and Exandria. If for example Eberron has content which demonstrates how this feature is not exceptional, that’s still fine in an answer, as long as it is stated that it might not apply to all settings.