Hi,
do following,
<AC> display radio ap-id 1
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AP ID Name RfID Band Type Status CH/BW CE/ME STA CU
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1 aaaa-aaaa-aaaa 0 2.4G bgn on 6/20M 11/32 0 39%
1 bbbb-bbbb-bbbb 1 5G an11ac on 161/20M 31/31 0 21%
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As we can see that the transmit power is smal for 2.4 band only 11/32 so we have to increase this power so we did the following commands
[AC-wlan-view] ap-id 1
[AC-wlan-ap-1] radio 0
[AC-wlan-radio-1/0] calibrate auto-txpower-select disable
[AC-wlan-radio-1/0] eirp 127
Do the same for another band also.