With this command, you have already selected the nsxt service "com.vmware.nsx.ip_sets" as a $ipsetsvc variable.
$ipsetsvc = Get-NsxtService -Name com.vmware.nsx.ip_sets
I guess if you want to view all the services in a pagination style, you can do the following:
Get-NsxtService | Out-Host -Paging
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