... My sister claims they could see it in some separate "legacy wallet" showing up on the trezor interface??? It is not clear to me exactly what she is talking about and I don't think they have any screen shots. But I can interrogate her further on this if necessary.
By "Legacy Account" they're probably referring to this:

The Trezor Suite has a similar section:

Have you been using the Trezor Suite or the wallet.trezor.io website to connect up the Trezor and investigate the available accounts?
