You will find that when Rustdesk is added to an Apple system
Once downloaded the program will start asking iOS for permissions and you need grant these permissions to iOS before you will be able remote access
You will need to restart Rustdesk after you have completed the changes and usually are prompted to do so
You can follow the prompts to Privacy and security or manually set up quickly by the following the steps here :
Go apple System settings
Then Privacy and security `
Once you are in the Privacy and Security area you need to select "Screen Recording" and Switch on
Once you have completed this step use the back button at the top in the middle of the screen
Select "Input monitoring"
and turn this on as well
Don't forget that you will need to restart Rustdesk
