It was spotted first in October 2021 and started slowly rolling out after that. From now on, it should be available to more users. On the app's homepage, you can choose between Browse and Watch tabs. Watch tab can be scrolled vertically but also in a horizontal way if there are several screens in the Idea Pin.
Apart from that, you can check a "Discover Creators" button on the home tab as well, where you can explore new profiles to follow.