N.B.: This is not a feature request as I do not believe there should be a sound made when a minecart is placed (unless intended). This most likely is, however, linked to the other subtitle issues with minecarts.

Please refer to the attached images when mentioned.

(Reference to wiki image) The Minecraft wiki correctly informs of many sound issues relevant to minecarts, i.e. missing subtitles (MC-177078, MC-181831 and MC-204124), and sounds options (MC-42132). There is one more.

(Reference to all other pictures) When a minecart is placed, it is subtitled as "Minecart rolls". Despite that, no sound event plays, and no minecart placing is listed in /playsound minecraft:entity.minecart. This also occurs for all other minecart variants.

I have only attached the images for the latest snapshot, but can also post the ones I have for the latest version (1.16.5) when needed.