Finding the list of numbers you have blocked on your iPhone is a straightforward process, though the specific menu location may differ slightly depending on your iOS version . Apple maintains a single unified list across all native communication apps— Phone, Messages, FaceTime, and Mail —meaning you can access it through several different paths.
If you primarily use iMessage or FaceTime, you can find the exact same list by following these paths: how to find numbers you've blocked on iphone
If you're also interested in finding blocked messages (for iMessages and SMS/MMS), you can do so in the Messages app: Finding the list of numbers you have blocked
Here, you will see a complete list of all phone numbers and names you have blocked. how to find numbers you've blocked on iphone