S3 HeadObject for Nonexistent Bucket (or Key): Handling the Error

[Navbryce]

My goal: Catch and handle when the bucket/key is not found

If I call _, err := myS3Client.HeadObject(....) for a nonexistent bucket (or key):

I expect one of the following errors.As to to be true but they all return false:

var noSuchBucket *types.NoSuchBucket
errors.As(err, &noSuchBucket)
var noSuchKey *types.NoSuchKey
errors.As(err, &noSuchKey)
var notFound *types.NotFound
errors.As(err, &notFound)

The only thing that seems to work is casting it to a ResponseError and checking that the status code is a 404. Is this expected behavior?. Will any of these assertions ever return true for HeadObject if it's not found?

Thank you!