I am aware of that, but there have been NEON AES optimisations floating around, e.g.:

I guess what I'm asking is if EL8 aarch64 ships with any such thing enabled, and any other tweaks I could try to squeeze more ssh speed out of it. I'm finding that piping data over aes-128-cbc (which seems to be the fastest implemented cipher) over gigabit ethernet tops out at about 30MB/s per CPU core, with each ssh session being limited to this (even though I can run 8 sessions in parallel at that speed).