Just wanted to chime into this thread, as I didn't see this information anywhere around the forums.
There's one exception to being a direct YouTube Partner Program member. If you don't meet the 1k-4k requirements, MCNs still have the ability to partner you under their Managed CMS if you are under that limit. It is only for the Affiliate CMS in which you need to be a YPP member. But obviously, most MCNs partner channels under the Affiliate CMS, so they need to follow the YPP requirements.
But going back to the OP,
@Samantha Cunningham all previous posters are 100% correct. If YouTube didn't accept your channel into the YPP program, then no MCN will.
Cheers.