At times we decide to stop using a web service, therefore, we export the personal data out of the service. If you are on the same path, when you are submitting the request for backup, for the coming hours, make it your ultimate priority to download the backup file from the service providers' portal - maybe twice if it is really important so that the data isn't lost. Most service provider keeps the backup file for a week or less so it is critical for the user to download the backup data before that.

A year back, I decided to move on from Notion and I submitted the request for a backup file. Somehow I forgot to download the backup file and few months only I realized that I had to download that. The data was gone forever.