Do you do any of the big 3 compound exercises? They are the benchpress, squats and deadlifts. Machines are okay but they should only be used once you're done with the compound exercises since they utilize multiple muscles at once and are great bang for the buck.

Maybe you can limiting your cardio too since you don't need too much of that if you're trying to build muscle.

I see. Then you should start doing them lol. Make sure to perform them in proper form to avoid injuries.

Running, cycling, swimming... There are many forms of cardio. Most people who want to build muscle do them strategically to lose fat but they don't do them all the time because it can potentially eat up the muscles too. There's a reason why you don't see big roided bodybuilders ever hopping onto a treadmill.