NSA - anchor layer LTE band - how to detect priorities from signaling

[punto]

Hi,

how can we detect priorities of anchoring layer for different LTE bands, to make addition of 5G leg, from signaling messages , if possible
Of course, case is Non-Standalone ...

Which message and part can show us this ...

thanks and best regards,

P:)

[punto]

It is related to event thresholds, but , is there any smarter way to get the whole picture of different operators layering strategy in fast way by use of available drive test logfiles ?