HUF is a member, not a footnote.
A Hindu Undivided Family can hold its own demat and mutual fund folios. In GrowUrDhan, HUF is a first-class member so those rows are not filed under a person’s PAN by mistake.
This page does not explain whether you should form an HUF, how to open one, or how it is taxed. That is outside the product. The app only records an HUF you already track.