Filing for an estate

My mother passed away in mid-December last year (2023).  We have a tax accountant filing her final tax return, but we're wondering what to do about the half month that she wasn't alive, since her assets generated income during that period (mostly accrued interest from money markets and CDs).

We're still going through probate, and while I know I'll be named the executor, that is still some weeks in the future.

Are we responsible for filing a return this year for those final weeks in 2023 on behalf of her estate, even though the estate is still going through probate?