I find the Azure Frontdoor ruleset documentation lacking.

Goal is to redirect sub.contoso.com/s/{number} to sub.contoso.com/my/stop/{number}

Example: sub.contoso.com/s/1234 -> sub.contoso.com/my/stop/1234

This might not be possible with redirect? Also tried with URL rewrite as shown in the documentation:

Condition action URL rewrite with source pattern /s/ and destination /my/stop/ with preserve unmatched path enabled.

However, nothing really works as intended.

Anybody had success with this?