Do you get new decorations when you unlock new hideout?

if i get map exclusive hideout do i get it's decorations, or all players get all free decorations at start?

I can't remember since it's been a while, but I believe you buy them with favor.
Earning favor is/was free and you get that by just playing the game iirc.

But obviously some decorations cost are real money.

Haven't gotten a new hideout in a few leagues, but as far as I know, it is no longer the case. Back then, when we bought decorations for favor from the masters, we got the decorations the hideouts came with, for free.
But nowadays we have *unlimited* amounts of the standard decorations so I guess you won't get anything from it. Afaik all non-shop decorations that are still available are available for everyone from the start.