Thank you, there’s nothing called “Custom Posts options” in the Translations menu.
I did find it in the Translation Management menu, but it says the following:
You haven’t set your synchronization preferences for these custom posts: Refunds, Webhooks, Events, Venues, Organizers, Tickets. Default value was selected.
You haven’t set your synchronization preferences for these taxonomies: Event Categories. Default value was selected.
And there are 2 options for Custom post types”: Translate & Do nothing, but I can’t select either one of them.