I believe so. You can study the schematics for yourself if you are an electrical engineer. I’m not! @amosbatto ?
That blog post is 6 years old and is clearly talking about laptops, but for the Librem 5 the proof of the pudding is in the schematics.
I think not by default but see: How to get Lirem 5 kernel log in /var/log/syslog in addition to systemd journal? - #3 by Skalman