Could you try below one that I found here - update-azsynapsesqlpool
Give -Name value as your SQL pool name
Update-AzSynapseSqlPool
[-ResourceGroupName <String>]
-WorkspaceName <String>
-Name <String>
[-Suspend]
[-PassThru]
[-AsJob]
[-DefaultProfile <IAzureContextContainer>]
[-WhatIf]
[-Confirm]
[<CommonParameters>]
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Please don't forget to Accept Answer and Up-vote if the response helped -- Vaibhav