can i see other people's shared files on Mega?

No, you cannot see other people's shared files on Mega unless they have specifically shared those files with you and provided you with access links. Mega uses end-to-end encryption, which means that your access to files is restricted to those that are shared directly with you. If someone shares a file with you, you'll receive a link that allows you to access it, but you won't be able to browse or see other users' files without their permission.