D6,D8,D9 have a blue filter of some sort attached to a leg of the component, labeled AB3, AB4, AB5. I'm unsure what those, do honestly, but assume they are separate from the actual chip itself.
Not all links are sales site links, there are some that are datasheets, or sales sites, with no stock, but data sheets....it will get you a far bit further, than where you were.
Best of luck.
@Mitsurugi-w If we have a data archive for this, where it can be centrally accessed by community members if needed, it may do some good for folks down the line. Could also use some information filled in.