Why is White considered so much better in this position?

If that wasn't enough White's rooks are very mobile and can attack down the d or e files, potentially doubled, or supported by the queen.

White has a protected passed pawn on c5, which means almost all endgames will favour White.

The d4 square is also a great spot for the white knight (indeed the engine suggests Ne2 preparing for that) If Black has to give away his g7 bishop, then the king could be in trouble due to the weaknesses of the dark squares around it. And things aren't much better if he doesn't

Black can't really use its "good" g7 bishop to attack any targets, not play ...a5 to try to create new ones. The "bad" b7 bishop is in an even worse situation as it's pretty much doing nothing where it stands

Black pieces are poorly coordinated (its attack can't go anywhere precisely because of the bishops being unable to join) The h5 rook could even be in big trouble, but it's probably not worth to even exchange it for a white minor piece (White would still be winning after that of course)

Unlike White's c5 strong pawn, the d5 pawn is a weakness and Black will have to constantly look after it.

For all of these reasons I think White has a very significant advantage, but one of the problems with assigning a number to it is that it obscures its nature. It's not really a material advantage that will always be there unless we screw up badly. White needs to play with energy (Ne2-d4 among other things) and try to transition to a favourable endgame. Otherwise Black will eventually activate its pieces and be OK.

Anyway beware that Stockfish often likes to change its mind a lot until it analyzed the position in great depth! But I think that in this case if it does change mind it'd say White has an even bigger advantage!

Here's my theory for this position. The engine is evaluating +2 advantage because black's rook can be trapped.

First, watch carefully, that rook on h5 is isolated from the main game and has only another safe square to move (i.e, f5), where it can be backed by Queen (on e6), as well as the pawn on g6. So it is dubious to exchange white queen for a rook.

So now, white's idea is to activate its knight in the game. Watch carefully, Nd4 can trigger a threat to the Queen on e6, as well as on f5 square (previously discussed safer square for the rook). And, after black's reply, white can simply play Bf3, that creates some nasty threat for the rook on h5. If rook goes to h3, then after Kg2, it's completely trapped.

So, black can try something like Rh6. And then, white can simply take by Bxh6. Now, as rook is worth 5 pawns, and the bishop is worth 3; so it's (5-3) = +2 advantage for white.