@Tango - you can certainly Filter your table on the GUID using e.g.:
Delegable:
Filter(
'Your Data',
Len(TextInput1.Text) = 0 || 'Your Guid Name' = GUID(TextInput1.Text)
)
Non-delegable:
Filter(
'Your Data',
Len(TextInput1.Text) = 0 || StartsWith(
Text('Your Guid Name'),
TextInput1.Text
)
)
Non-delegable:
Search(
AddColumns(
'Your Data',
TextGUID,
Text('Your GUID Name')
),
TextInput1.Text,
TextGUID
)
Notes:
The above will also apply on a Modern Table Control.
Are you certain you cannot locate your Unique Identifier Column? The name of the field typically shares same name as your Dataverse Table.