Spot Color Pantone 802 C from Dimension to Photoshop To Pdf Acrobat problem

I have 3d artwork created in Adobe dimension of a kid's boardgame so lots of bright colors especially with 5 green fluorescent green ring objects. These objects are the only ones that's colour does not translate from RGB to CMYK. So I decided to add an extra spot color channel for those objects for printing manufacturer who have the Pantone 802 C I have chosen. The problem is many fold but the end result is simple, I cannot preview the color as intended in Acrobat to feel confident to send to manufacturer for mass printing. The weird thing is I was seeing the fluoro green adhering to the K channel black objects before I worked out how to create a new channel and I knew the spot was attracted to BLACK first and foremost but now that I have defined my own black areas in pantone channel I am just getting a dark green. The fluoro green has completely disappeared!

SPECS: I am working on macbook pro running 11.5.1 and I have all up to date Creative cloud Adobe full license software.

I am uploading image in Photoshop PDF CMYK converted file showing correct spot and then Acrobat showing just a dark green for spot.