Inspired by What will happen with reminders after Google Inbox dies?, which focuses mainly on future and, in particular, recurring reminders, I would like to know what happens to past ("Done") reminders, both the stand-alone ones as well as the note ones attached to emails.
And, more specifically, is there a way for me to convert "Done" reminders into something (like fake emails) that I can use (read, search, find) in Gmail? If so, could note ones be associated to the corresponding email thread?
I have checked various Gmail APIs, and none of them seem to allow me to access any "Inbox by Gmail"-specific information, which is a bummer. How do I takeout these data?