By default, the AWS S3 console lists only the buckets that are owned by the account that you sign in without listing buckets from other accounts, even if the user has access to the buckets. Thus, if you want to access a bucket in another account, you need to know the bucket name. For example, by typing the following link:
https://s3.console.aws.amazon.com/s3/buckets/bucket-name/
(Hint: Replace the “bucket-name” with your bucket name).
You will be able to see the bucket in the console, provided that you have permissions to access the bucket using the console.