No, I haven't found an updated TWRP but Nougat for Mi Note Pro has been launched just hours ago... I hope someone will cook a 3.0.3 TWRP version for Leo soon
In fact, you can install it via ADB, but it won't boot: current TWRP versions doesn't work with 7.0 bootloader. So is useless... And when booting via fastboot boot twrp.img command you'll get dbt error
You'll have to wait for a modified TWRP and then install it via ABD
Yes, we'll have to wait for a new and modified TWRP. Or maybe we can try the method explained for 4c (untested for Note Pro): install official developer China 6.1.7, unlock bootloader, install TWRP, flash whatever .eu version you need