Mine has the JB5 brakes, but nothing looks obviously wrong to me. I’d wonder about the rust spots under the shoes (instead of shiny metal) meaning “are they even working?” but would have to defer to others on that.
Your shoes look fine, there is still some thickness before it gets to the rivet heads. There doesn’t look to be any fluid contamination from a leaking axle seal or wheel cylinder.
How does the driver side look?
Oh, and go get a floor jack and stands. Don’t crawl under there using that factory jack.
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