I have a fairly similar configuration (FW16, batch 5, 7840HS, no GPU, 2 NVMes [Samsung 990 PRO, WD SN770M]) and, although the situation seemed to have improved recently (I have spent several months without a hiccup: [RESPONDED] Waking from suspend w/ lid closed - #61 by Xavier_G), my FW16 failed to wake up from suspend this morning.
Like @Jason_Rivard, I am interested in any way to inspect the state of the embedded controller.