I know about the obvious stuff like a bright vest, blinking rear light and wearing light colored clothes but is there anything else that I need for when nightfall hits?
Get retroreflectors. White pointing forward, red pointing back. You won’t always realize when a light craps out, it’s best to have passive backups. Get amber-colored retroreflectors that you can put between the spokes so you have sideways visibility. You can also buy reflective tape and wrap it around the frame.
A slightly less ugly alternative to amber reflectors between the spokes are reflective clips that wrap around each spoke:
https://www.salzmannltd.com/products/salzmann-3m-spoke-reflectors
I’m also pretty sure that lights in the EU are required to also function as a reflector or that at least most modern ones do.