I often use "pending changes filter" in Visual Studio to filter changed files in solution explorer, which is helpfull in large solutions. https://www.visualstudiotips.co.uk/tip/pending-changes-filter/
Now i use rider instead VS. Does such thing exist in rider?
No, it is not possible right now. Feel free to vote for the next issue:
https://youtrack.jetbrains.com/issue/RIDER-16273
There is a separate tool window Commit
instead. If you enable Group by Directory
option it should work for you almost in the same was as a filter in the solution explorer.