Hi PDev,
Greetings from Syncfusion support
Based on your requirement, you want to perform search on child Grid using the parent search.
By default, we have bound the child grid based on the parent grid data. So, we are unable to perform inner search (across each child grid) in Grid.
For Example, If you search as “VINET” or something then we checked whether the value contains in parent first if it does not contain parent then we have shown “no records to display” message and it does not consider the child grid contain search value or not.
Please get back to us if you need further assistance with this.
Rajapandi R