I've been running my own Nextcloud instance on a Linode with 2FA and your response made me question how secure it is. Even though I get an A+ on the Nextcloud

I've been running my own Nextcloud instance on a Linode with 2FA and your response made me question how secure it is. Even though I get an A+ on the Nextcloud Security Scan (https://scan.nextcloud.com/ https://scan.nextcloud.com/), have 2FA, and custom IP blocking set up in my .htaccess file, it's disheartening to know that I'm not as secure as I thought I was. I removed all my photos/files from iCloud for privacy reasons, and now I feel helpless contemplating how Linode may just hand my data over if served a warrant. Any other Nextcloud hardening tips besides Fail2ban and reverse proxying you'd recommend? May I ask what your workflow looks like for preserving files throughout time?