There are many UEs supporting 5G->LTE ANR.
Basically UE should have below capabilities.
MeasAndMobParametersCommon - eventB-MeasAndReport
handoverLTE-EPC
eutra-CGI-Reporting
mac-ParametersXDD-Diff longDRX-Cycle
It’s not same. You case is ENDC case.
What @onkar.ghatpande is asking is NR SA to 4G SA ANR.