Is there a term for when elements become ubiquitous in a SciFi/Fantasy series that were absent earlier? [duplicate]

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• What is a retcon, or retroactive continuity? 3 answers

Writers love to create new species, technologies, important concepts, etc. in their Scifi/fantasy novels, TV series, movies, universes... so a lot of times when you go back to re-read / re-watch you'll see that earlier episodes are very obviously missing elements that are introduced later and become ubiquitous.

Is there a name for this problem/trope?

Examples:

• Star Trek: Enterprise seems to show a lot more Alien diversity already known to humanity than Star Trek TOS did, which seems contrary to the flow of the story


• Medichlorians completely missing from original Star Wars trilogy


• Lost has a ton of these

Note that I am not looking for a reason for these like "sloppy writing" "natural progression of a series", "better special effects later on", but rather a name for this phenomenon.