I still can’t think of examples of women knowingly dating trans men and calling themselves straight or even any posts online really where a woman in such a situation wanted reassurance that she was straight.

Well, there is a sub-celebrity FtM here that has a straight identified wife, but it's not something the media likes to put too much focus on.

Also, the fact that said FtM celebrity tends to not be very woke (she dropped some interesting remarks about gay men in some interviews) might be a factor in this.

Public media, social media, and Big Tech generally are doing a lot of work to convince gay men they should be attracted to females, lesbians that they should be attracted to males, and men that they’re definitely totally straight for having sex with and partnering with trans women. For example:

https://www.playboy.com/read/yes-you-re-still-straight-if-you-date-trans-women

https://www.vice.com/en/article/kb4jw9/the-straight-men-who-have-sex-with-trans-women

All the effort the media has put into normalizing GAMPs as 'true and honest' straight men have failed miserably, as nobody takes it seriously.

They're more agressive with the propaganda in regards to gays and lesbians because they have more power inside their social circles, that's it.

They're cowards.