Open your project in DaVinci Resolve
Go to Project Settings
Set Timeline frame rate to the desired rate above 60 FPS
Set Playback frame rate to the same rate
Import or create media that matches the higher frame rate
Edit your timeline as needed
Go to the Deliver page
Choose a format that supports high frame rates
Select a codec that supports your target FPS
Set the resolution you want
Set the frame rate to above 60 FPS in the render settings
Make sure the export frame rate matches the timeline frame rate
Disable any settings that force a lower frame rate
Add the job to the render queue
Start the render
Verify the exported file properties after rendering