1. Install Termux from Play Store
2. Open Termux and type "su" and grant root permission (if you failed first startup, please change app data to internal storage)
3. type "props" and type "1" -> "f"
4. showing manufacturer. type "26" (it's example. if you want use other manufacturer, change number)
5. showing device names. type "78" (it's example. in this case should be "Samsung Galaxy Tab S3 LTE")
6. type "y" and "y" (rebooting)
7. check SafetyNet after reboot.
I can't help about Vanced. it working my tablet with my solution
2. Open Termux and type "su" and grant root permission (if you failed first startup, please change app data to internal storage)
3. type "props" and type "1" -> "f"
4. showing manufacturer. type "26" (it's example. if you want use other manufacturer, change number)
5. showing device names. type "78" (it's example. in this case should be "Samsung Galaxy Tab S3 LTE")
6. type "y" and "y" (rebooting)
7. check SafetyNet after reboot.
I can't help about Vanced. it working my tablet with my solution