There's no lobbying necessary, because FICO isn't a government agency, its a private company. Why we have a private company determining such an important thing with minimal government oversight is certainly a question we could be asking.

That being said, there's an innocent explanation for this specifically. BYPL is pretty new as a common type of debt (became popular in the last five years). They're putting it into FICO 10. The last time they updated FICO was FICO 9 which was released in 2014, before that there was FICO 8 in 2008... a lot of banks are still using FICO 8 or even earlier models. Banks are slow to change, and FICO moves slowly because banks don't want their models upended every year. Fwiw if the government was more involved in this I doubt it would be taken into account any faster.