Yes, unless somehow it is removed from all accessible the relays.
Discussion
This is a different dynamic from all other social media...inability to delete. Will be interesting to see how this plays out.
which is impossible to ever be conpletely sure of nostr:npub1avszmzlpnns43ydv7gm7wm9eynwg5q5jlwk7yjlpjerwxfkek35szhplc4
That isn't true. There is a nip that allow you delete stuff, but isn't implemented because of reasons. Just ask the nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg