They are pushing their platform, which will be a competitor. So using that design means using their lasers, something Poet has already had to go through and re-design to incorporate industry standard lasers (Lumentum). So customizability may be more limited. The other question is what is the cost?
As an aside, here is an 800G pluggable you can buy today,
https://opticswave.com/products/800g-osfp-dr8-1310nm-2km-dom-optical-transceiver-module-1
check the price... US $20k per module.
rogue