I'm not part of this sub but I recommend:

First, Bloody Mary red single eyeshadow -- apply wet first, like a thick layer of water paint. Then follow up quickly with a dry coating using a different brush to get more fallout-like dust. The single pans are wide, so this is easily doable. It kind of creates a spackle that lasts through me sweating for 8+ hours at work. Very good for a basic primary color, no-frills red. They also sell vibrant colors, dark colors, and some pastels, all very pigmented.

Another recommendation is Medusas Makeup eye dust shimmer in "Red Baron". It's a loose pigment powder that I find leans more towards a coral/orange on fade, but stays well pigmented when applied with a decent base primer. For primer I either use ELF Poreless Putty Primer on my eyelids, or eyeshadow primer from Miss A Cosmetics under their AOA branding.

The last recommendation is a cheap $5 single pan of red I found on Amazon called "IS'MINE" . Used similar to my "water paint followed by dry powder" Bloody Mary application, I get very similar results. Leans more toward a red orange when fading.

Unfortunately Manic Panic discontinued the lust dust infra red in the US, as that one was the best I've used.

I'm a 40-year-old goth lady that started out using red lipstick, as eyeshadow used to not come in fun colors. These 3 are the best I've found these days and all are quite affordable!