This may be a new one but I think emulators have been around since the 80’s. I would guess this is a better one too but I recall them being a “thing”back then. We had a Hammond A-300 with a Leslie cabinet (bass players dads- he still has it of course) so didn’t have much need of an emulator…
These have been around a bit as plug ins for Pro Tools and the other recording software packages. I'll agree with Jim, these appear to be particularly well done.
I had not heard a Lesley used on anything but an organ till I went to a show which RedBone played at Pacific Coliseum 48 years ago yesterday Grand Funk Railroad / Redbone.
they played the first act. Never forget listening to Lolly’s guitar playing Maggie through a whirling Lesly. Was an experience worth hearing