LWC Conditional Rendering – How to Render Properties on Community/Digital Experience Pages

You can pull your Lightning Pages and other dependent metadata down to your local VS Code, run a Find/Replace across your project, and simply do a force:source:push or force:source:deploy, that will deploy all the changes at once.

Hello Thomas and welcome to Salesforce StackExchange.

This is a more advanced topic but it is possible through Dynamic Picklists.

You will have to configure the component to expose a property for the selected Campaign (e.g. selectedCampaignId), then on meta XML something like:

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata" fqn="helloWorld">
    <apiVersion>45.0</apiVersion>
    <isExposed>true</isExposed>
    <masterLabel>Hello World</masterLabel>
    <targets>
        <target>lightningCommunity__Page</target>
        <target>lightningCommunity__Default</target>
    </targets>
    <targetConfigs>
        <targetConfig targets="lightningCommunity__Default">
            <property label="selectedCampaignId" name="name" type="String" datasource="apex://MyCampaigns"/>
        </targetConfig>
    </targetConfigs>
</LightningComponentBundle>

And then on MyCampaigns you retrieve the options:

global class MyCampaigns extends VisualEditor.DynamicPickList {
  global override VisualEditor.DataRow getDefaultValue(){
    // Implementation of default value
  }

  global override VisualEditor.DynamicPickListRows getValues() {
    VisualEditor.DynamicPickListRows myValues = new VisualEditor.DynamicPickListRows();
    // choose the correct criteria to avoid performance issues
    for (Campaign c : [SELECT Id, Name FROM Campaign] ) {
      myValues.add(
        new VisualEditor.DataRow(c.Name, c.Id)
      );
    }
    return myValues;
  }
}

Reference on how to configure components for usage in Digital Experience (previously known as Community): Configure a Component for Experience Builder.

Reference for Dynamic Picklist.