Are you aware that you can develop features that don't exist on websites for 3rd party apps?
That's why I am in a community for a 3rd party app, here. I'm suggesting the lemmy developers add a feature to their application to further filter existing content in a way the user would find engaging.
Doing this would be trivial. The content is all already being pulled; it would be adding a simple UI element to the sidebar menu.
I'm afraid that with this sort of approach you're unlikely to get what you're asking for. AFAIK LemmyConnect has a single developer and it's an open source project that isn't paid. As a developer with a small open source project myself I've dealt with this style of request myself. Here are my red flags that you might like to address:
Doesn't bother to identify developer or developers
Doesn't try to identify project's preferred feature request route
Doesn't try to find out if feature is already on roadmap or requested or available elsewhere
Doesn't try to find out if feature is relevant to project or to base protocol
Takes an arrogant attitude with 'LMAO'/'LOL' etc
Claims feature 'trivial to implement'
Doesn't ask what would actually be needed to implement feature