What is striking me as odd is that they put a bash ring (chain guard) on this bike but are not running it close enough to the chainring to help keep the chain on. One of the benefits of running a bash ring is that they do a great job of acting as a chain guide. Another poster here with this bike mentioned that there were spacers behind the outer chain guard. Can you remove them to bring the chain guard closer to the ring? I ran a 1x9 setup for years on a mountain bike that saw a lot of very rough trails. I used a regular chainring (not 1x specific, not narrow wide) with a bash ring / chain guard on the outside. I never once threw a chain.

Unless your throwing the chain is due to it being bounced off, I don’t think a clutch RD would make a difference, and I don’t think they come in 9sp anyway.

A narrow-wide ring would likely help IF the issue is that the chain is getting bounced off goong over bumps.

OTOH, if this is happening even on smooth ground, then it sounds like some sort of chainline issue. I would check to see where your chainring is lining up on your cassette.

As per some previous advice, I would check that the RD is putting tension on the chain in high gear. If your chain is too long it may me going slack in 9th gear.