Mac Photos migration missing folder and albums

I've just migrated my photo library (Mojave OS X) to Lightroom CC. Everything went fine but I miss all the album and folder. This is a problem because I have a large library of 350Gb and about 17.000 images. I'd really love to use lightroom but searching and dividing 17.000 photos is not and option. I could I solve this issue?

Thank you