FYI - they sell jackets and ponchos that are 100% reflective.

I also recommend retroreflective tape applied to the scooter, front and rear lights, a camera or two (drivers and pedestrians both are waaaay less willing to be abusive on camera and if there’s an accident, you have evidence), and maybe a MIPS helmet with a light built in (or retroreflective tape applied).

You can also look at getting a Hiplok Gold with reflective cover: It’s a cut resistant chain that you can wear as a belt when you’re not locked up.