Scenario vs Mod capabilities?

[Oarc]

Apologies if this is in the wrong forum section!

I've been doing a lot of "server-side modding" aka scenarios, and I keep running into limitations.
Is there a definitive list of differences of the capabilities between scenarios and actual mods?

Mods are clearly less limited, but I don't fully understand what scenarios can NOT do.
For example, no modifying data.raw? Not changing map generation settings?

If anyone can point me to any information on this, that would be great!

Thanks,
Oarc