You're in luck. You can get full Thunderbolt Bus on yours.
Linked below is my build and guide. Download the EFI at the bottom and grab the SSDT for Thunderbolt along with the 3 patches from the Config. I have OpenCore and Clover setup for it.
You'll need to check your Thunderbolt Bios settings as well which I have listed on the guide too.
Are you on Big Sur by chance?
If so, the ASMedia USB 3.1 controllers load a different driver now which causes restarts and shutdowns to fail and eventually it wont load at all until shutdown fully. This also made my Thunderbolt Controllers fail to shutdown as well making botched starts. In my EFI you'll also find an ASMedia.kext that will resolve that issue. Theres also USB mapping for that if you want to dive in further.
NorthAmTransAm’s Pro Tools Machine: ASUS Prime Z370-A | i9-9900K | RX 580 Note 1: Please do not simply grab the EFI and carry on. You need to read through all of this first. Get an understanding and set yourself up for success. Note 2: I've saved us from repetition here. Please visit Dortania...
www.tonymacx86.com