I'm curious about this, has there been a lot of ultimatums given to performers (i.e. demands that they be open to doing scenes)?

I don't know any specific cases, but the industry as a whole, specially on the "gay" side (most gay pornstar aren't gay and most gay studios aren't even owned by gay people), has a clear disdain to "close minded" people.

It wouldn't surprise me in the slightest if there were performers being blacklisted for not wanting to shoot with FtMs because of this alone.

Are people like Lily Cade outliers or just ones with guts/work secure enough to say something?

Yup.

The industry is a shitty monopoly, so there's a lot of incentives for people to keep their trap shut about things like this.

Also, they're into woke shite, very woke shite.

The only FTM performer I know of really is Buck Angel, who from interviews seems engaging, friendly, and surprisingly open to TERFery

This is the exception, not the rule.

There's three which comes to mind when speaking about this subject: Noah, Luke Hudson and Trip Richards.

The first a literal example of yaoi-sick girl, which is funny considering she looks like a 13 year old "soft-boi". Also, her tweets makes me want to bang my head against a wall for 20 minutes.

The second one I know little about, but she is the way-to-go performer studios go to when they need to virtue signal about TRA talking points.

The third is an interesting case: like Buck, she went for the masculine, roided out look, but her voice sounds like a mixture of Donald Duck and a Muppet. She admited once that she doesn't have sex with men, or sex at all, outside of porn shoots, which is very revealing.

She is also known to be a really unpleasant person, even by TRA standards.