So just stumbled across this: "Project: Super Woman" - Looks like she was acting in this as "Bella", with 8 items under her name:

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• Super Video Mini & Bella As Mindy Marvel Set 1
• Bella Super Wonderfull 2019 Photo Set 2
• Dark Bella Photoshoot
• Dark Bella Supporter Level Package
• Mary Bella Spring 2020 Photoset - Supporter Level
• Super Bella: Security Detail
• Triple Threat (4K Supporter Level)
• Mindy Marvel: Lost Souls

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Looks like this is where the "Evil Supergirl" pictures came from, but I've not had any luck finding any of these images or videos anywhere else.

For those interested, I made a Fakes/AI thread