When you create a Substack profile, by default, posts that you like will appear on your profile.
Tip: Posts you've liked may not appear if the post is on an invite-only publication or if you've chosen not to display the publication on your Substack profile.
To make your likes private, follow these steps:
1. Sign into your Substack account and click on your profile picture. Select Settings.
2. Select "Edit" in the Profile section.
3. Scroll down to the Activity Privacy section and next to "Your likes" click the toggle. A grey toggle means that posts you've liked will not be displayed on your Substack profile and your profile won't appear on the Likes list on a post.
Note: Historical likes on posts prior to the launch of the new Likes feature (late May 2022) will not be visible. Ex. If in January 2022 you liked a post, that will not appear in the Liked section on your Substack profile.