Thanks for reaching out regarding the issue you are experiencing.
I understand that you are unable to use your Remote finder feature with your Roku Voice remote Pro, is that correct?
If you have a Roku Voice Remote Pro, you can trigger a lost remote finder by saying "Hey Roku, where's my remote?" in a clear and direct conversational tone. If the hands-free voice was not turned on when your remote was misplaced or your remote could not hear your command, you must use one of the other methods to trigger the feature. For help using hands-free voice, read more about how you can use your voice to search and control your Roku device.
Re: Find Remote not working after voice remote pro installation.
That is not useful if you're trying to find the other remote. If you use the voice remote pro to go settings - Remotes & devices - remotes - enhanced voice remote - find Remote, the the only remote that makes any sounds is the Voice remote pro, the one I'm not trying to find!