Below are some steps that could help.

Set the network adapter to never sleep

• Run the Device Manager
• Open the section Network adapters
• Right-click the adapter and select Properties
• In the Power Management section, uncheck "Allow the computer to turn off this device to save power"
• Click OK

Set the computer to never sleep

• Run Power Option
• Click Change plan settings
• In the Plugged in section, set "Turn off the display" to your preference and "Put the computer to sleep" to Never

This will turn off the display to conserve power and monitor lifetime, but keep the computer on

Set the router to Wake-on-LAN

An alternative to never sleep is to be able to wake up the computer when required.

Wake-on-LAN requires the hardware to be able to send the wake package, and especially the router.

See the following posts:

• RDP wake-on-lan in LAN environment
• Wake-on-lan only works so many times