Thanks for reaching out. Most eligible channels actually hear back in 30 days and all applications are still manually reviewed, so it does take a bit of time. Hope you hear back soon – in the meantime, here’s more info about the review process: https://yt.be/help/YPP-review
Sorry to hear you've been waiting so long–you may not have enough *public* watch hours to be eligible for review. Creator Studio shows public & private combined, but you need 4k public hours alone. Try switching private videos to public: https://yt.be/help/YPP-review