At least with office 365 you have a cached version of your email.

Google drive is hard as the only way is to setup continuous Google takeout's or use a third party service for backups which the last time I looked several years ago.

And still, after years and years and years people do not have backups, especially if they have their data in the cloud. From my experience the number of backups people make went down not up.

If my comment helped one iota to make backups more likely next time, I did good.