It doesn't show up for me
Viewing post in Broken Dreams Correctional Center comments
If you play with mods, make sure they're all up to date and/or wouldn't interfere with that, potentially.
Otherwise, maybe you have to reach some level of trust with Eliza? I'm not sure, since I haven't tried this on a fresh(er) character. After making some more lab progress and walking to her desk, some story progression will occur with her, from time to time. Eventually, you get the option to have sex with her. I didn't think to check for the TF menu until some time after that stage