If you want to create a filter for the whole report, instead of applying them one by one to your widgets, you would need to create a source filter for that. You can click here to find a step-by-step guide on how to do that.
Here is a list of integrations that support a source filter:
Google Analytics
Google Analytics 4
Google Ads
Facebook Ads
Google Display & Video 360
Simpli.fi
Big Commerce
Basis
Criteo
Adform
Spotify Ads
Salesforce
Big Query
Campaign Monitor
Yahoo Ads Japan
Snapchat
If you have any questions regarding this or anything else, don't hesitate to reach out!