I was fixing a flat on a newish bike and noticed these bumps from the spokes around the inside of the rim. The rim tape is reassuring and I assume it's all fine, but I don't really know what is supposed to look like. Is what's seen here normal? The bike is a Trek Precaliber.
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Without being pedantic you’re seeing the top of the nipple making an impression on the rim tape.
It might be OK. Lift the tape/liner with a blunt edge and have a look under. As long as the nipple is flush with the rim bed and the spoke isn’t significantly exposed (< 1mm) above the nipple head it’s all good. The rim liner is strong and tough to protect the tube.
The last image is what you are looking for and shows that your rim has a flat spot or the nipple has come loose. Carefully tighten the nipple down without bringing the spoke through and check the rim for trueness correcting if needed.