RSIC-V based are probably the most widely available microcontrollers / dev boards, but they unfortunately don't have AES accelerators.
On the other hand, ChaCha20 (or ChaCha12) run great on them.
I don't follow. I haven't done an exhaustive search, but it seems all esp32, whether xtensa or riscv have AES accelerators. Not sure I've seen a modern 32 bit Arm MCU without it either.