They also support gimmicks like “reacting” to messages which get overlaid in-line with a heart icon. On SMS it is sent as “MooseBoys loved ‘be right there’”.
Technically, yes SMS doesn’t support reactions. But you can do what Google does and just parse that text and “turn” it into a reaction for viewing purposes.
If an iPhone user sends me a reaction it looks fine to me, but funnily enough now when I send one back it looks the exact way Apple sends it to non Apple devices.