Seasonings for soup?!?!

I’m making soup in my crock pot with bell peppers, zucchini, carrots, celery, canned tomatoes, ground turkey, and a little onion

For broth I’m just using boxed chicken broth

I’ve been tasting it every few hours and it just doesn’t have enough flavor for me

I used salt, pepper, onion powder, garlic powder, and Italian seasoning but I just don’t know what else to put in it to make it good

Any suggestions??