The Coast Armor Trim is still called "Smithing Template" in 1.21.2 snapshots (affects both 24w33a and 24w34a).

How to replicate: Load up a world in either 24w33a or 24w34a, acquire a Coast Armor Trim, then look at its name.

Expected Result: It's called "Coast Armor Trim", with the text below saying "Smithing Template"

How it was before 1.21.2: It's called "Smithing Template" with the text below saying "Coast Armor Trim"

Observed Result: Both the name and the text below say "Smithing Template"