So, it looks like there is an unofficial TWRP build that supports the 7T, 7T pro, and the MacLauren.
Before anyone goes looking for it, I want to remind everyone that flashing experimental software is a dangerous proposition! It could be buggy, and pre-compiled binaries could be maliciously altered. Even if they appear to work, they could have a hidden payload. The rule of thumb, I would say, is, if you can't afford to buy a new phone, then you can't afford to be "wreckless" with the one you have.
Having said that, there is a source repo available here:
https://github.com/mauronofrio/andro...g_unified_TWRP
If there are any Devs that have the correct device, there is your start.
Everyone else, please be patient! It'll come, eventually.