The PowerAutomate approval workflows only allow 4 filter-fields to be used in the header and 4 on the lines of a document. The default filters for approvals already include 3 fields (Document type, Document status, Amount >0) which leaves only one filter to be used for individual requirements. When using this for sales orders and one wants to exclude Intercompany partners and prepayment-orders this can't be done with one field alone, leaving the customer with only one option: to use the BC-included workflows instead of PowerAutomate.

Also, the filter fields only include Business Central standard fields (of the API-page). A way to include more fields as filters from standard and third-party extensions would prevent one from needing to implement a custom connector.