Hi @Anonymous ,
Since your Column name contains space, when Odata is queried, the name it displays is not the original name.
I have made a test on my side to create a Client Account Name field in the list, when use Odata filter, the expression should as below:
ClientAccountName eq 'Al Clawson Disposal Inc'


For easy solution, you could use the filter array action as screenshot below:

Best regards,
Alice
Community Support Team _ Alice Zhang
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