As long as the seed was not created offline (e. g. with a nostr:npub17tyke9lkgxd98ruyeul6wt3pj3s9uxzgp9hxu5tsenjmweue6sqq4y3mgl ) and only the public key was transmitted to any app at an online device, the online device access to your wallet.
Always create and store the seed offline.
Don’t trust- verify!
#seedsigner
#notyourkeysnotyourcoins