Desktop Kobo MacOS app

Hi

Since years I used the Kobo Destop app on MacOS to sync my Kobo reader to Calibre in order to convert my books I bought on Rakuten from ePub to PDF.
Since few days I got a message from Apple warning me that this app won't work anymore soon as it won't be compatible with the new MacOS system (stop Roseta support app).
I know now that the Rakuten Kobo desktop app is not anymore supported here in Europe by Rakuten (since 2024 it seems) then no chance to get an update.
From then I want to know if it will be possible to continue to use Calibre to do the conversion of my purchased book knowing that the solution on Rakuten's side is to use the web app so no more physical connection between my Kobo reader and Calibre (and then how to use the oBok DeDRM I use today?) ?

Thanks for your advice
BR