val myBoolean = false & true gives a compilation error in Kotlin (Unexpected tokens (use ';' to separate expressions on the same line))
The "operator" you are looking for is the infix and function in Kotlin (reference page: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/and.html)
Therefore your example should be
val myBoolean = false and true
andfunction? kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/and.html