Using your Cloud PC with Parsec or Steam Remote Play should work fine if you are using the service via Pay As You Go as it has no usage limits.
If you are using a subscription however, the stream will likely end after 20 minutes, as our platform will think you are idle if you are not using our streaming client.
(Parsec mentioned above on Pay As You Go)
Learn more about usage limits here: https://stimsocial.zendesk.com/hc/en-us/articles/19397077862803-What-are-the-usage-limits-with-the-Stim-Cloud-PC