I learned a while ago that constant thoughts of death and despair before sleep may indicate an anxiety disorder. However, since online diagnoses from strangers are almost always bullshit, I’d like to recommend a weighted blanket. I know it sounds stupid, but the weighted blanket fucks are right. You probably want one.

Yes, I’ve checked with a AVM Fritzbox. They do deligate /56.

Here’s the IPv6 configuration on his WAN interface:

Here’s the IPv6 configuration on the LAN interface towards my router: