<mvt:do file="g.Module_Library_DB" name="l.success" value="ProductVariantList_Load_Product(l.settings:product:id, l.settings:variants)" />

This has all the info we need:

<mvt:do file="g.Module_Library_DB" name="l.success" value="ProductVariantList_Load_Product(l.settings:product:id,l.settings:product_variantes)" />
<mvt:foreach iterator="pv" array="product_variantes">
	<mvt:eval expr="miva_array_serialize(l.settings:pv)" />
####

</mvt:foreach>

two example array elements:

:part_count=1,:parts[1]:active=0,:parts[1]:agrpcount=0,:parts[1]:cancat_id=0,:parts[1]:catcount=0,:parts[1]:code=CO1016-XSGRY,:parts[1]:cost=0,:parts[1]:disp_order=683,:parts[1]:dt_created=1588110645,:parts[1]:dt_updated=1588370221,:parts[1]:id=683,:parts[1]:inv_active=1,:parts[1]:inv_available=0,:parts[1]:inv_instock=0,:parts[1]:inv_level=in,:parts[1]:inv_long=0+available,:parts[1]:inv_low_level=0,:parts[1]:inv_low_track=0,:parts[1]:inv_out_level=0,:parts[1]:inv_out_track=0,:parts[1]:inv_short=In+Stock,:parts[1]:name=Ladies%27+Cherokee+Scrub+Pants+SIZE%3AXSGRY,:parts[1]:original_active=0,:parts[1]:page_id=0,:parts[1]:pgrpcount=0,:parts[1]:price=0,:parts[1]:sku=CO1016-XSGRY,:parts[1]:taxable=1,:parts[1]:weight=0,:product_id=417,:variant_id=108

:part_count=1,:parts[1]:active=0,:parts[1]:agrpcount=0,:parts[1]:cancat_id=0,:parts[1]:catcount=0,:parts[1]:code=CO1016-SMGRY,:parts[1]:cost=0,:parts[1]:disp_order=684,:parts[1]:dt_created=1588110645,:parts[1]:dt_updated=1588370223,:parts[1]:id=684,:parts[1]:inv_active=1,:parts[1]:inv_available=1,:parts[1]:inv_instock=1,:parts[1]:inv_level=in,:parts[1]:inv_long=1+available,:parts[1]:inv_low_level=0,:parts[1]:inv_low_track=0,:parts[1]:inv_out_level=0,:parts[1]:inv_out_track=0,:parts[1]:inv_short=In+Stock,:parts[1]:name=Ladies%27+Cherokee+Scrub+Pants+SIZE%3ASMGRY,:parts[1]:original_active=0,:parts[1]:page_id=0,:parts[1]:pgrpcount=0,:parts[1]:price=0,:parts[1]:sku=CO1016-SMGRY,:parts[1]:taxable=1,:parts[1]:weight=0,:product_id=417,:variant_id=109