I can suggest you to open your seed phrase through mycrypto desktop wallet. It will help you to know what address that contained by your seedphrase.
I have ever encountered this problem and this solution is fixing my problem. Try to download mycrypto destkop wallet then you can go to the menu view and send > open through seed phrase through mnemonic phrase menu.
thank you so much sir, by using mycryptowallet and the seedphrase I managed to see all the linked sub accounts and their private keys, then used the private keys to import these sub accounts on metamask
a........gain thank you so much
Glad to see you are able in accessing your sub accounts again. I recommend you to use such wallet caused by it's really friendly wallet for ethereum users. been using it for several years and yeah, good lucky for you. Always be careful when accessing your fund and keep safe.