I didn't hear back from her.
When she responded to my texts she sounded really grateful that someone had offered support, I invited her to come here for advice and support and to look for a local rescue on Catchat, but I fear when she said she wanted "help" what she meant was she wanted someone to come and take the cat off her hands so she didn't have to bother finding somewhere for him herself, or arrange his TNR which would likely have resolved the problem.
She didn't call back and I don't know if she joined.
I hope she found somewhere for him.