1. Open any one of the incident Record in the native UI/ Next Experienece , make sure you select the view as your required workspace (here i have selected as SOW) :

2. Scroll down and select the related list tab where you want to apply the filter :

3. Select the filter icon and add your filter conditions :

4. Click Set as Default Filter.

5. Now if you go to The workspace, you will see the Default filter has been applied :

Hope you learned something new 🙂

Sandeep Dutta