KotlinUnitTest.kt

@Test
    fun extractPlaceholderData() {
        val input = "{{product:12;k:13}}, {{product:14;k:15}}"
        val regex = "\\{\\{.+:(.+);.+:(.+)}}".toRegex()

        var result = regex.find(input)

        result?.destructured?.let {
            (first, second) -> println("$first : $second")
        }

        result = result?.next()

        result?.destructured?.let {
            (first, second) -> println("$first : $second")
        }
    }

// Output:
14 : 15