The 2108422-1: The listing note says it plainly: contacts are not included. This housing accepts TE's standard 2.00 mm pitch crimp socket terminals — you'll need to source those as a separate BOM line. For a 9-position, 2-row layout, the mating header will have 9 pins arranged in a 2x5 or 2x4 plus 1 pattern.
Sourcing Reality — Active Part, Quoted to Order
It's a current-production TE housing, available through independent distribution. No official cross-reference or second-source is on record, so stick with the TE 2108422-1 for the BOM. The ROHS3 compliance means no exemption paperwork needed for EU-regulated markets.