New LTE Cell low traffic

Hi Experts,

I would like to know the reason behind the low traffic in a new LTE cell (B28) 700mhz ( up to 1 max rrc connected) in comparison with its counterpart in B2 1900mhz (up to 70 max rrc connected)

What kind of balance technique can I apply here, or what I need to check on my side?

No interferences, no alarms, ET working well and good coverage values, only impacted in number of rrc connections KPI.

Zte vendor.