Libre Cloud’s head office is a unit on an industrial estate: 82A James Carter Rd, https://maps.app.goo.gl/nu75EEHEDFbY5PMW9 (Update: it’s a virtual office address, which doesn’t really inspire confidence for me)
They probably colocate at data centres.
Personally, I’m on Hetzner’s Storage Share (Nextcloud but without Collabora), and I’d prefer to trust my data to them: https://www.hetzner.com/storage/storage-share/
Regardless of your choice, I definitely agree that nextcloud rocks.
If it helps, Adguard Home has individual settings of 24h, 7d, 30d, 90d for logs and stats.