Is your feature request related to a problem? Please describe.
The WW3+SCHSIM coupling requires following fields to be exported from WW3.

• Sw_wavsuu: eastward_wave_radiation_stress
• Sw_wavsuv: eastward_northward_wave_radiation_stress
• Sw_wavsvv: northward_wave_radiation_stress

and at this point the fields are not available through the new cap (or mesh cap provided by CESM). The missing fldlist_add() calls preventing to export those fields even if wiring with the internal data structures (such as wavsuu to sxxn) done in model/src/wav_import_export.F90. Maybe I am missing something but it seems that if I add fldlist_add() call, I could able to pass those fields to SCHSIM.

Describe the solution you'd like
Required modification can be done in the new cap to provide those fields.

Describe alternatives you've considered
The old cap can be used but there are some feature in the new cap that is used in UFS Coastal (DATM+WW3 configuration).

Additional context
N/A