I was thinking for sure that it would all be epoxied together and entirely unserviceable unless you pulled the whole lens apart.
Any ways, a word of caution for superglue, it will emit a vapor as it dries which can make any residue left over from fingerprints, etc, stand out. I learned this the hard way once.
I'd suggest a very thin layer of clear silicon around the inside of the trim ring. This will work and is easy to pull off later on as well as clean up.
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