Deck Sanding Question

I’ve stripped using Defy and sanding using a standing sheet  orbital, 36 grit.  All the stain is off (or 95%)...it looks good, but some spots darker than others.  Planning to clean, brighten, then stain with TWP 100 Rustic.

Are the darker areas pictured a concern?  Wondering if Brightener will make this all more similar and stain soak in everywhere. Not looking for perfection, just don’t want to totally screw it up.

Appreciate any help.  I’ve read and learned a ton here.  I did not us a drum sander as I am handy as a doorknob.  Hope the orbital and Defy remover did enough for me.

thanks!!