Primefaces 10 dataexport with subtable not working

Question

After we switched to Primefaces 10, the data export from a table with a subtable no longer works. Does anyone have a similar problem or solution? Our goal is to download the table with the subtable in an Excel file.

Sourcecode:

                 <p:splitButton
                        id="submitButtonId"
                        value="#{msg.global_button_search}"
                        update="table"
                        icon="#{style.global_icon_search}"
                        actionListener="#{appointment.loadEvents}"
                        styleClass="MarTop10">
                    <p:menuitem
                            value="#{msg.global_button_exportExcel}"
                            icon="#{style.global_icon_excel} splittIcon"
                            id="xls"
                            ajax="false">
                        <p:dataExporter
                                type="xlsxstream"
                                target="table"
                                fileName="Terminueberwachung" />
                    </p:menuitem>
                    <p:menuitem
                            value="#{msg.global_button_exportPdf}"
                            icon="#{style.global_icon_pdf} splittIcon"
                            id="pdf"
                            ajax="false">
                        <p:dataExporter
                                type="pdf"
                                target="table"
                                fileName="Terminueberwachung"/>
                    </p:menuitem>
                </p:splitButton>

Answer 1

Primefaces Extensions had the subTable option and it was removed in favour of Primefaces 10. So expectably, Primefaces should cover all it's functionality, but in this case, it doesn't.