R5: Does the exception vector table reside in TCM if at 0x0000 0000

The vector table resides at either 0x0 or 0xffff0000, defined by a pin at reset, and reflected in the V bit of the SCTLR:
https://developer.arm.com/documentation/den0042/a/ARM-Processor-modes-and-Registers/Registers/System-Control-Register--SCTLR-

If TCM is at 0x0 and V bit is 0, then yes, you can place the vector table there (and this is a very common scenario). You may have reset behavior that starts from 0xffff0000, then enable and initialize TCM, then clear V bit to enable subsequent exceptions to be handled in TCM.