To be clear, the blade adds TPM 2.0 via an Infineon chip, and you can interact with the chip, but features like secure boot require bootloader-level integration, and at this time, since no other Pi hardware has TPM, the Pi's closed-source bootloader doesn't support it.
Also something interesting to noodle on: technically the Pi 4/CM4/Pi 400 have ECC RAM [1] — but some ECC functionality may require CPU-level integration... which I'm guessing isn't present on the Pi's SoC (but who knows? I posted this forum topic asking for clarification: [2]).
Also something interesting to noodle on: technically the Pi 4/CM4/Pi 400 have ECC RAM [1] — but some ECC functionality may require CPU-level integration... which I'm guessing isn't present on the Pi's SoC (but who knows? I posted this forum topic asking for clarification: [2]).
[1] Product brief mentions LPDDR4 with on-die ECC: https://datasheets.raspberrypi.org/rpi4/raspberry-pi-4-produ...
[2] https://www.raspberrypi.org/forums/viewtopic.php?t=315415