To enable weekly recurring donations as an option on your form, simply follow these steps:
1. Locate the form you want to update on your campaigns page and click the edit icon.
2. Next, click 'Essential' under Donation form. All recurring donation options will be shown under the section marked 'Donation intervals.' Click the checkbox marked 'Weekly' to enable this interval. Select 'Save and Preview' or 'Next' to enable automatic weekly recurring donations.
You'll see Weekly included as an interval on your donation form: