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TLV320AIC3120: Class D inductor

Part Number: TLV320AIC3120

Hi, We are using a Class D Filter (BTL Common Mode) with a Cutoff Frequency of around 20Khz. 1.6W is fed through an 8-ohm speaker.

The filter inductor value is 36uH.

These are our queries, Answer them point by point:

1)Which one would you suggest among the Dual Coupled inductor and Fixed inductor?

2) In the case of Dual inductors, will it be ok if a dual "coupled" inductor Array is chosen? Or should it be Non Coupled as in the below figure?

4)What should be the minimum Inductor saturation current and Inductor RMS current(for Fixed individual Inductor)?

5) For now we have chosen P/N: DRQ74-220-R (https://www.digikey.in/en/products/detail/eaton-electronics-division/DRQ74-220-R/667309), with the below specs.

     We need feedback/Suggestions/guidance on the dual inductor selection based on the below parameters like current rating etc.