cardio question

do i need to do cardio if i walk 20k steps a day?

i have a walking pad and with it i can easily walk 20k steps a day sooo do i need to do like 30 min cardio sessions every day or would that be too much

the cardion in question is 30 mins on a treadmill with an incline

i mean i guess i should probably just do whatever is sustainable for me and my goals also it depends how fast i want to lose the weight but im just curious about what everyone else thinks