Play multiple action animation mixer

Hey folk,
i have an object contain many actions of animations , then i want to play it with scroll , i am already do that for one action

        mixer = new THREE.AnimationMixer(model);
            var action = mixer.clipAction(gltf.animations[1]);
            action.play();
            createAnimation(mixer, action, gltf.animations[1]);

function createAnimation(mixer, action, clip) {
    let proxy = {
        get time() {
            return mixer.time;
        },
        set time(value) {
            action.paused = false;
            mixer.setTime(value);
            action.paused = true;
        }
    };

    let scrollingTL = gsap.timeline({
        scrollTrigger: {
            trigger: renderer.domElement,
            start: "top top",
            end: "+=500%",
            pin: true,
            scrub: true,
            onUpdate: function () {
                camera.updateProjectionMatrix();
            }
        }
    });

    scrollingTL.to(proxy, {
        time: clip.duration,
    });
}

but i want to play all of actions , i don’t need to be separated so maybe i can merge its in blender or not ??