Hi @MS Techie ,
As per the warning messages, these would be automatically removed when they are addressed in the future releases of Az.Monitor Azure PowerShell module. However, I am reaching out to our internal product team to confirm the same and also to check on from which Az.Monitor Azure PowerShell module version these warning messages would probably be removed. Will keep you updated as I hear more information.
Until then, as a workaround, if we want to suppress these warning messages then we may use common parameter WarningAction in your command i.e., "-Wa 0" or "-WarningAction SilentlyContinue". Let me know if you have any further queries with regards to it.