If you can get the internet connection. Just post match results to the PractiScore website. It will need to be done periodically (at least a few times a day). Then competitors can check results directly on the PractiScore website or use the PractiScore Competitor app
Without the internet connection the recommended option is to use a “guest” wifi or an access point (separate from the main match wifi) and put a separate “secondary” master tablet on that wifi to where competitors could pull scores from (either using wifi sync in the PractiScore app or wifi sync in the PractiScore Competitor app) or make that tablet available to competitors to look at. You’d need to periodically update that tablet from the main “master” tablet and bring it back to the “guest” wifi.