I read project readme, checked client side and server side configurations, and no such feature exists - YES/NO
YES
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The mod currently only uses left-click for all attacks. Players cannot perform different attack types with separate buttons, limiting combat creativity.

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Add right-click attacks as a new feature

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Allow modders to customize both attack types via config files

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Use 1.20.1 and 1.21.1

This is out of project scope.

❗️

Also this would create LOTS of incompatibilities, with other mods (but also with Minecraft Vanilla) in general.