There’s a dead stormtrooper revealed as Finn stands up, fairly close to camera and only viewed from one angle. A 2D image could probably be manipulated to take its place to serve as a dead Phasma. She’d even be in about the right place based on where the characters were before the kaboom.

I might even go for this change in the post-IX revision of my TLJ edit, if Phasma can be featured like this. Finn would make his character-arc-defining resolution away from nihilism/hiding by telling DJ, “you’re wrong,” then confirm it by going “where [they] belong.”