Hi, I found this steps, I hope they help you:
Access the Power Automate portal:
Sign in to the Power Automate portal with your Microsoft account.
Select the "Machines" tab.
2. Select the desired machine:
In the list of machines, find the machine for which you want to change the connection timeout.
Click the machine name to open its details page.
3. Edit machine settings:
On the machine details page, scroll down to the "Settings" section.
Look for the "Connection timeout" option.
Enter the new timeout value in seconds. The default value is 30 seconds.
4. Save changes:
Click the "Save" button.
5. Restart the machine:
For the changes to take effect, the machine must be restarted.
If the connection timeout is too short, Power Automate may not be able to connect to the machine and the desktop flow will not run.