The UA FX CM BSD file in tag UAFX-1.00.02-2024-02-02 contains several types using Bit type representation which moreover seems incorrect since NodeSet2 contains a different definition:

opc.ua.fx.cm.types.bsd:

    <opc:StructuredType BaseType="ua:ExtensionObject" Name="CommunicationFlowConfigurationConfDataType">
        <opc:Field TypeName="opc:Bit" Name="FlowPropertiesSpecified"/>
        <opc:Field Length="31" TypeName="opc:Bit" Name="Reserved1"/>
        <opc:Field TypeName="opc:CharArray" Name="BrowseName"/>
        <opc:Field SwitchField="FlowPropertiesSpecified" TypeName="opc:Int32" Name="NoOfFlowProperties"/>
        <opc:Field LengthField="NoOfFlowProperties" SwitchField="FlowPropertiesSpecified" TypeName="ua:KeyValuePair" Name="FlowProperties"/>
    </opc:StructuredType>

opc.ua.fx.cm.nodeset2.xml

  <UADataType NodeId="ns=1;i=13012" BrowseName="1:CommunicationFlowConfigurationConfDataType" IsAbstract="true">
    <DisplayName>CommunicationFlowConfigurationConfDataType</DisplayName>
    <Category>UAFX ConnectionManager Configuration</Category>
    <Documentation>https://reference.opcfoundation.org/UAFX/Part81/v100/docs/F.1.6</Documentation>
    <References>
      <Reference ReferenceType="HasSubtype" IsForward="false">i=22</Reference>
    </References>
    <Definition Name="1:CommunicationFlowConfigurationConfDataType">
      <Field Name="BrowseName" DataType="String" />
      <Field Name="FlowProperties" DataType="KeyValuePair" ValueRank="1" ArrayDimensions="0" IsOptional="true" />
    </Definition>
  </UADataType>

It seems to be the case for all types using "Bit" field types.