Amazon does not let you fully delete order history from your account
You can archive orders to hide them from the main order list
Sign in to your Amazon account
Go to Your Orders
Find the order you want to hide
Select Archive order
Confirm the action
Repeat for each order you want hidden
To view archived orders, go to Account & Lists
Open Your Account
Select Archived Orders
Use a separate Amazon account for private purchases
Use Amazon Household if you need shared access with separate order histories
Remove or restrict access to your account on shared devices
Turn off order notifications on shared email accounts if needed