Why this pointing to global context is giving undefined, even when global variable is defined ?

this is my program

var status = "online"

setTimeout(() => {
    
    const status = "offline"

    const data = {
        status: "not responding",
        getStatus(){
            return this.status;
        }
    }

    console.log(data.getStatus())
    console.log(data.getStatus.call(this))

}, 0);

why console.log(data.getStatus.call(this)) is returning undefined ?