You can try downloading one compatible closed and open eye image (https://icons8.com/icons/set/glyph-eye-close) and import it as image resource then map to corresponding one using the password properties of the widget. (Show password Button Image/Mask Password Button image).
I haven’t tried out this , usually we use core widgets.
Hi,Ayah. The loginForm widget must be available to you. And the show/mask function is available in the widget. Hope this helps.