These are shortcuts to each institution's own sign-in page — you tap through and log in there. A tile can open their website or their native app — that only changes which door you walk through, and you still sign in on their side every time. This page holds no balances, no account data and no credentials, and talks to no banking API. The address under each name is the real destination; check it before you tap. Press and hold a tile to change its name, icon or links.
Point this anywhere on their site — a card page, not just the homepage. Sign-in still happens on their side. No account numbers in either field.