It is this year (2023) only!
Passione Engiadina is the high end event, taking place every year.
This year the event is dedicated to Lancia.
https://www.passione-engadina.ch/passione-engadina-edition-2023/The organizer together with the town (rather than village) of St Moritz has produced the idea of this add-on, inviting Lancia owners to see the (certainly interesting) Lancias that will be exhibited and driven in the main event.
Would suggest to interested parties to come for one week to drive in that superb region, the Engadine, then finish with all the Lancias in St Moritz.
I shall be there!
