Toddler tantrums

Anyone have any advice on tantrums? My 2 yo is constantly throwing fits when she doesn’t get what she wants. She literally wants me to just sit there and hold her all day. I also have a 4 yo and a 10 month old so me sitting there and holding her all day isn’t an option. My baby gets frustrated because she wants my attention but I can’t put my 2 yo down without her crying and screaming. I’m losing my mind and feel like I’m failing as a mom.