To be clear, on the FW13 this shouldn’t normally be an issue, as Framework had earlier submitted a kernel-side workaround that essentially disables keyboard wakeup on then-current firmware 3.04, and a further update to the version check when 3.05 did not fix the issue:
So if you’re running Arch on the FW13, haven’t deliberately switched to a non-default (e.g. stable) kernel, and haven’t deliberately passed the kernel parameter that disables the workaround, you should not be seeing wakeups.
Cannot say anything about the FW16. Note this thread is about the 13 only, so perhaps consider speaking out in the one about the 16?