S20+ "content transfer" calendar events not syncing to new S24ultra phone

[Mjm_22]

When I made the move from iPhone to s20+ my calendar events transferred to the S20+ as My Phone \ "Content transfer". From then on, all new calendar events I created on the S20+ defaulted to calendar "content transfer".

Fast forward to now when I've upgraded to S24U. Samsung switch, Google Calendar, and Samsung calendar wont sync or transfer the "content transfer" calendar and or events.

How can I manually migrate these to the new phone (back end file transfer via PC?) OR convert all Content transfer calendar events in the S20+ to Samsung calendar (without having to do it one by one manually) so that i can then sync to new phone?

Thank you!

[Windroid]

you can use a third party app that downloads all your calendar entries as an ICS file then import that file to your new phone and pick whatever calendar you want to use.
by the way, that's called exporting/transporting/migrating , not syncing.
have a look at https://eu.community.samsung.com/t5/galaxy-s22-series/unable-to-sync-my-samsung-calender/m-p/1101180...