At our mosque we pray with a gap of 1.5m between us due to the public health orders. From my understanding this is more than the allowed gap for jama’at prayers. So I was wondering given the circumstances, do we still get the reward for jama’at prayers and is it accepted?

Yes 1.5 meters is more than the maximum distance, so technically one cannot make the niyyah of Jama’a. One must pray individually. One will be rewarded for making the effort to come to the masjid and praying in it, and for showing importance for prayer.