XR500 / ipq806x Router MIMO 2.4 & 5.0 ghz


I recently installed OpenWrt 22.03 on a XR500 router and noticed that I do not have single and multi-user MIMO on 2.4 ghz radio; however, it does appear to be enabled on the 5.0 ghz radio. Is this by design? Can it be overridden?