By default, your PPC Protect dashboard will default to the local timezone of the system you are using. This is the same behaviour as expected within Google Ads.
This means that if your clients view their PPC Protect data they will automatically see their data in their own local timezone. For example, an agency account based in New York, USA with a client account based in the United Kingdom:
The agency will see all data in EST when viewing the PPC Protect dashboard
The client will see all data in GMT when viewing the PPC Protect dashboard