I did some minor Net surfing and apparently the two books that haven't been released yet are in the Victorian Village series. The first book has already been out but there's a 2nd one supposedly due for release on May 26th and the third book is tentatively set for May 1st, 2021.
Last night/early this morning, I ended up ordering a copy of the first book in the Orchard Mysteries, One Bad Apple.
The last book in the County Cork series (because of her passing, not because she was done with the series), Fatal Roots, came out in January so whenever it gets released in paperback I'll pick that one up as well.