It seems that a group of Religious Zionist rabbis have organized, under the umbrella of the Tzohar organization, a kosher certification authority that is an alternative to the Israeli Rabbinate’s. This is due to the Rabbinate’s new policy of allowing local rabbis to forbid the use of the “heter mekhirah“, thereby boycotting farmers who rely on it.
Overall, this seems to me to be more about the Israeli Rabbinate being taken over by Charedim than anything else. The Religious Zionist community now needs a new infrastructure in which to operate, as their old infrastructure falls apart. It’s probably a good thing.