I didn't find it on prime video. Does it exist on Netflix?
Season 1 is only available legally and for free on Joyn
I don't know where you can watch it, but I know that it doesn't exist on netflix.
As far as I know, "crunchyroll" is the Netflix for anime. I don't know if there's that there.
It's there, but I can't really see it
Are you from Austria or Switzerland?
Unfortunately, it is extremely country-dependent. On Netflix, I can only watch half of what the Americans can do. That's why I no longer have subscriptions to streaming services. Or you do it via VPN, but that is no longer as reliable as it used to be.
It was available in the Pro7 maxx mediathek for a while. It has now been almost completely removed. The rest will also be removed in the next few days.
Germany
Mine is still running at Crunchyroll.
Ok, then you probably just need a subscription