As of September 2024, macOS Sequoia does not offer you the feature to set third-party apps as Finder extensions. Please follow either of the given ways to use the Finder right-click menu on Sequoia.
Download BandizipHelper by clicking the button below, decompress and run the app to set Bandizip as a Finder extension.
Or you may open Terminal and type the following commands to set Bandizip as a Finder extension.
Refer to the help at the link below after setting Bandizip as a Finder extension.
Help » How to use the Finder right-click menu for Bandizip