After you use an item with a cooldown; if you save and exit then rejoin the world the cooldown, the cooldown resets and you can use items with long cooldowns a lot faster this way.
Environment
Windows 11 23H2 Java Edition 1.21.4
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Thank you for your report!
We're tracking this issue in MC-111801, so this ticket is being resolved and linked as a duplicate.
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This ticket duplicates MC-111801