Currently, Studio doesn’t support changing the favicon of a campaign.
But if you have paid for a subscription plan, we may assist you in making 1 simple manual update, once a month. With this, you can request us to change the favicon of the campaign.
Alternatively, you can purchase the Technical Support package, then we may support you with multiple simple manual updates during that Technical Support period.
Please contact us at firstname.lastname@example.org when you want to do so.