Yeah, ditto but having been through these ruts many times in the past I can offer some advice
ADHD makes you incapable of settling into easy
You have work to do but it's easy. You have a side project but you've figured out the hard parts and so it's just the implementation grind, which is easy.
Find a challenge
switch your side project to a whole new tech stack. find a new job that you're not quite qualified for. take on job responsibilities at your job that you don't know how to do. mentor someone.
I also find going to meetups and conferences gets the spark back sometimes