Seeking advice on which 46T chainring I get for a 2022 Diverge Comp Carbon?

Hi all,

I've biked a lot on a hybrid over the last few years and recently got a used 2022 diverge comp carbon as my first "nicer" bike. Although I ride a lot I don't really know much about bikes and I'm trying to learn now.

I ride about 30-40% gravel and the rest on road, and find myself maxing out on the road and wishing I could go faster. I almost never use the larger sprockets on the cassette unless I'm going up a very steep hill and I'm otherwise virtually always on one of the two smallest sprockets.

My research suggests that the way to achieve what I want is to get a 46T chainring but I'm having trouble understanding things like what chainring to get (# of bolts? why are some more expensive than others?), would I need a new chain, and so on. And the Specialized Diverge documentation says a 46T chainring is the highest it can take — or can you go higher (and even if could, should I)?

The stock parts on my comp carbon can be found on the website and (I think) the pertinent things are:

    Cassette: SunRace, 11-speed, 11-42t
    Crankset: SRAM Rival 1x
    Chainrings: 40T
    Bottom Bracket: Sram GXP

Am I correct that this crank means I need to get a 5 bolt chainring?

Would this 46T chainring work (SRAM FORCE 1 X-SYNC CHAINRING), or even if it does, is there some other option I should be considering?

Appreciate any advice, and thanks.