All mikrotik devices since ROS v6.42 can do bridge VLAN. Some can offload it to hardware (switch chip; RB750Gr3 is one of them), others do it with their general-purpose CPU. But the end effect is the same. If configured properly. So why your hEX config, transplanted to CCR, doesn’t work is a big question and without seeing actual config export (from CCR) we’d be just guessing.