4.1 latest schematics

TP-DATA and TP-CLK are not used.

Those signals do not connect to the IMXRT1062 chip. They connect only to test points which PJRC uses to test the hardware and program the bootloader firmware during production. If you have removed the GD32 chip, they aren't connected to anything.

If you still have the GD32 chip connected, I do not recommend attempting to use those signals, as you could accidentally erase the bootloader chip. If you disregard my advice and do end up erasing the chip, know that the code is not published and PJRC does not sell that chip separately (we do sell the original MKL02 chip) so you will have no path to restoring your Teensy back to its original condition.