Visit preferences > privacy: at the bottom you see the "last updated" as day and time without an option to check for updates.
By now, my latest content-blocker update is 20 days ago.
Please consider implementing an update-option to search for an updated version for content-blockers.
Version 0.99.116-beta (WebKit 614.1.20) - MacBook Air 2018 - macOS 12.5 (21G72)