Using a Powershell script to find a bitlocker value of TpmPin

Question

I need a PS script that will result with True or False depending if TpmPin exists within 'KeyProtector' (see attached pic)

I have tried:

$res3 = Get-BitLockerVolume -MountPoint C
if ($res3 -like 'Tpm'){write 'True'} else {write 'false'}

but always get 'false' even though the value is there. see screen shot

I've tried some example snippets found elsewhere on this site and they work:

$coll = 'one','two','three','four'
if ($coll -contains 'two'){write 'True'} else {write 'false'}

this returns T/F as needed.

What am I doing wrong? Thanks